The Screenwriter's Glossary: 30 Essential Terms Every New Writer Must Know

Screenwriting has its own language. Not a difficult one, and not an arbitrary one — but a precise, functional vocabulary that has developed over a century of professional practice. Every term in this glossary exists because it solves a specific problem: how to communicate a visual story, on paper, to a room full of people who need to build it.

When you use these terms correctly, your script signals something important to every reader who opens it: that you understand the form you are working in. When you use them incorrectly — or avoid them entirely — the script signals the opposite, often before the story has had a chance to speak.

This glossary is organized into five categories. Format terms govern how a screenplay looks on the page. Structural terms describe how a story is built. Character terms define the people who inhabit it. Camera terms give the director visual instructions. And industry terms are the vocabulary of the professional world your script is entering. Use this as a reference while you write, not a list to memorize before you begin.

Part One: The Page — Format Terms

These are the terms that govern the physical appearance of a screenplay. They are not stylistic preferences. They are the standardized architecture of the form, and they exist because a screenplay is not a literary document — it is a production document, read simultaneously by writers, directors, actors, producers, and crew. Everyone needs to read the same page in the same way.

Slug Line (Scene Heading)

The slug line opens every scene. It tells the reader three things, in this order: whether the scene takes place inside or outside, where it takes place, and when. A typical slug line looks like this:

INT. DETECTIVE'S OFFICE — NIGHT

Or:

EXT. HIGHWAY — DAY

The slug line is always written in capitals, always on its own line, and always followed by a blank line before the action begins. The term "slug line" is common in American professional usage; "scene heading" is the more formal equivalent. They mean the same thing.

Why does it matter? Because the slug line is the primary organizational unit of a screenplay. Breakdown software reads slug lines to count scenes, identify locations, and calculate shooting schedules. A misformatted slug line doesn't just look wrong — it breaks the production pipeline before a single frame is shot.

INT. / EXT.

These abbreviations — Interior and Exterior — are the first words of every slug line. They tell the crew whether a scene takes place inside a building or outside, a distinction with immediate practical implications for lighting, equipment, and location logistics.

A scene inside a car, even a moving one, is typically INT. A scene on the roof of a building is EXT. When a scene moves between interior and exterior within the same continuous action — a character walking out of a front door onto a street — some writers use INT./EXT. or EXT./INT. to indicate the transition.

Action Line (Scene Description)

The action line is the prose of a screenplay. It describes what the camera sees: where characters are, what they do, what the environment looks like. It is written in the present tense, always, without exception.

Marcus enters. The office is smaller than he expected. A single bulb swings from the ceiling.

Action lines should be lean. The general principle is to write only what can be seen or heard on screen. Internal states — what a character is thinking or feeling — belong in the action line only when they are visibly expressed: a clenched jaw, a held breath, a hand that reaches for the phone and stops.

Long unbroken blocks of action text slow a reader down and signal a writer who has not yet learned to trust the image. The professional standard is short paragraphs, white space, and precise language.

Character Cue

The character cue is the name that appears above a line of dialogue, centered on the page and written in capitals. It identifies who is speaking.

MARCUS

The character cue must be consistent throughout the script. If a character is introduced as DETECTIVE MARCUS COLE, she may be shortened to MARCUS or COLE for subsequent cues — but whichever form you choose, you must use it every time. Inconsistency in character cues confuses actors and breaks continuity in production documents.

Dialogue

Dialogue is what a character says, written in a centered column below the character cue. It is indented from both margins, narrower than the action lines, which gives a screenplay page its distinctive visual rhythm — the alternation of full-width description and narrow speech.

Dialogue in a screenplay should sound like the character, not like the writer explaining the plot. The most common beginner error in dialogue is on-the-nose writing: characters saying exactly what they mean, feeling, or want. Real people — and compelling fictional ones — rarely do.

Parenthetical

A parenthetical is a brief acting instruction placed between the character cue and the dialogue, in parentheses.

MARCUS (quietly) She was here. I know she was here.

Use parentheticals sparingly. Their purpose is to clarify a reading that would otherwise be genuinely ambiguous — not to direct the actor's performance on every line. Excessive parentheticals are a mark of an anxious writer who does not trust the dialogue to carry its own meaning. In professional practice, a parenthetical that is not strictly necessary is almost always cut.

Transition

Transitions are instructions for how one scene moves to the next. The most familiar are CUT TO:, DISSOLVE TO:, and FADE OUT. They are written flush to the right margin.

CUT TO: is the default transition in cinema — the instantaneous movement from one image to another — and in modern screenwriting, it is usually omitted. If you write nothing between two slug lines, a cut is assumed. DISSOLVE TO: implies the passage of time or a dreamy, associative connection between two scenes. FADE OUT typically ends an act or the script itself.

Use transitions deliberately and infrequently. A script cluttered with CUT TO: between every scene reads as dated and adds length without meaning.

CONT'D

CONT'D — short for "continued" — appears in two contexts. After a character cue, it indicates that a character continues speaking after an action line has interrupted their dialogue. At the top or bottom of a page, it indicates that a scene or a character's speech continues from the previous page.

MARCUS She left this morning. (looking at the window) (CONT'D) At least, that's what they told me.

Most professional screenwriting software handles CONT'D automatically. Writers working in general word processors should apply it manually and consistently.

MORE

MORE appears at the bottom of a page when a character's dialogue runs onto the following page, indicating that there is more to come. Like CONT'D, it is largely handled by screenwriting software and is included here because writers encounter it on professionally formatted scripts and sometimes mistake it for an error.

Part Two: The Story — Structural Terms

Structural terms describe how a screenplay is built over time. These are the concepts that underpin not just screenwriting but all dramatic storytelling — rooted in Aristotle and refined through a century of studio development. Understanding them does not mean mechanically applying them to every script; it means having the vocabulary to think and talk about what your story is doing, and why.

Act Structure

The overwhelming majority of feature-length screenplays are built in three acts. Act One establishes the world, the protagonist, and the central dramatic question, and typically occupies the first quarter of the script — roughly 25 pages of a 100-page screenplay. Act Two follows the protagonist through escalating conflict and complication as they pursue their goal, and occupies the middle half. Act Three resolves the central conflict and brings the story to its conclusion.

The three-act structure is not a formula — it is a description of how most stories that hold an audience's attention are organized. Understanding the structure allows a writer to diagnose problems: a story that feels directionless in the middle usually has a weak Act Two. A story that ends unsatisfyingly usually has a resolution that has not been properly earned.

Inciting Incident

The inciting incident is the event that sets the story in motion — the moment that disrupts the protagonist's ordinary world and creates the central dramatic problem the rest of the film must resolve. In Jaws, it is the first shark attack. In Chinatown, it is the arrival of the false Mrs. Mulwray at Jake Gittes' office.

The inciting incident typically occurs near the end of Act One. It is the moment after which nothing can be the same — for the protagonist, or for the story. A screenplay without a clear inciting incident is a screenplay without a reason to keep reading.

Plot Point (Act Turn)

A plot point, sometimes called an act turn or turning point, is a significant event that shifts the direction of the story and propels it into the next act. The first plot point, at the end of Act One, sends the protagonist into the main conflict of Act Two. The second plot point, at the end of Act Two, launches them into the final confrontation of Act Three.

Plot points are not necessarily dramatic explosions. They can be quiet revelations, decisions, or discoveries. What defines them is their function: they change what the story is about, or what the protagonist must do next.

Midpoint

The midpoint falls at approximately the halfway point of a screenplay — around page 50 of a 100-page script. It is a significant event or reversal that raises the stakes of the second act, often by shifting the protagonist from a reactive position to an active one, or by delivering a revelation that reframes the central conflict.

The midpoint is one of the most useful structural concepts for diagnosing a second act that feels shapeless or slow. A strong midpoint gives the audience a sense that the story is moving, even in its longest section.

Climax

The climax is the point of maximum dramatic tension — the final confrontation between the protagonist and the central conflict of the story. Everything in the screenplay builds toward it. It is typically the moment in Act Three where the central dramatic question is answered, for better or worse.

The climax must be earned. If the protagonist resolves the conflict through a means that has not been established earlier in the script — a skill the audience has not been shown, a resource that appears from nowhere — the climax will feel arbitrary, and the audience's investment will evaporate.

Resolution (Denouement)

The resolution is what happens after the climax: the settling of the story's world into its new state. It answers the question of what the protagonist's victory or defeat means for the characters and the world of the film. Resolutions in film are typically brief — audiences understand, intuitively, that the story is over once the central conflict has been resolved.

Throughline

The throughline is the central spine of a story — the narrative thread that connects every scene from the first page to the last. A screenplay with a strong throughline has a clear answer to the question: what is this story about, and what is the protagonist trying to do? Every scene either advances that pursuit, complicates it, or reveals something essential about it.

Scenes that do not connect to the throughline — however entertaining in isolation — are candidates for removal. The discipline of the throughline is one of the defining constraints of screenwriting as a form.

B-Story / C-Story

Most feature screenplays carry more than one narrative thread. The A-story is the primary plot — the main dramatic question. The B-story is a secondary storyline, typically involving a supporting character or a subplot that runs in parallel to the main action. A C-story, where it exists, is a tertiary thread.

B-stories are not decoration. In well-structured screenplays, they serve the A-story: by providing contrast, by revealing something about the protagonist that the main plot cannot, or by bringing the thematic concerns of the film into focus from a different angle. A B-story that simply exists alongside the A-story without illuminating it is a structural problem.

Scene vs. Sequence

A scene is a single unit of dramatic action occurring in one location at one continuous moment in time. A sequence is a series of scenes connected by a single dramatic objective — a chase, a seduction, a heist, a journey. The distinction matters because sequences have their own internal structure: a beginning, a middle, and an end, with their own rising tension and resolution, nested within the larger arc of the film.

Understanding the difference helps writers diagnose pacing problems. A sequence that runs too long without internal escalation is a sequence that needs restructuring, not just cutting.

Part Three: The Character — People on the Page

Protagonist

The protagonist is the character whose journey the audience follows — the person through whose perspective the central dramatic question is experienced and ultimately resolved. Protagonists need not be sympathetic in the conventional sense; they need to be compelling, and the audience must be invested in the outcome of their pursuit.

A screenplay can have more than one protagonist — ensemble films distribute the central dramatic question across multiple characters — but clarity about who the protagonist is, and what they want, is one of the most fundamental requirements of the form.

Antagonist

The antagonist is the force — a person, an institution, a circumstance, or an internal conflict — that opposes the protagonist's pursuit. A strong antagonist is not simply an obstacle. She has her own perspective, her own logic, and often her own legitimate claim on the outcome of the central conflict. The most memorable antagonists in cinema are not evil for evil's sake — they are characters who want something comprehensible, and who are willing to do things the protagonist is not.

Character Arc

A character arc is the internal journey of a character over the course of the story — the change, or the refusal to change, that the events of the plot produce in a person. A character who begins the story closed off and ends it open has traveled an arc. A character who begins with an illusion about herself and ends with the truth — or who clings to the illusion at great cost — has traveled an arc.

Not every character needs an arc. Supporting characters can be static. But the protagonist of a dramatic feature almost always undergoes some form of transformation, and the arc must be visible in the writing — not declared in dialogue, but demonstrated in behavior.

Want vs. Need

One of the most productive distinctions in screenwriting is the difference between what a character wants — their conscious objective, the thing they are actively pursuing — and what they need — the deeper truth about themselves or their situation that the story will force them to confront.

A character may want to win back an estranged partner; what they need is to understand why they pushed everyone away. The tension between want and need drives character development, and the gap between the two is often where the most revealing scenes live.

Backstory

Backstory is everything that happened to a character before the screenplay begins — the history that shaped who they are when we first meet them. Backstory is essential to characterization, but it is almost never delivered as exposition. The craft of screenwriting involves finding ways to make backstory felt — in a character's behavior, in the way they respond to certain situations, in what they cannot bring themselves to say.

A character who announces their backstory in the first act ("I've never trusted anyone since my father left") is a character whose writer has not yet found the scene.

V.O. (Voice-Over) vs. O.S. (Off-Screen)

These two abbreviations are among the most frequently confused in beginner scripts, and the distinction between them is precise.

V.O. — Voice-Over — indicates that a character is speaking but is not physically present in the scene. The voice comes from outside the world of the image: a narrator reflecting on past events, a character whose thoughts we hear while the camera shows something else entirely.

O.S. — Off-Screen — indicates that a character is physically present in the scene, in the same space as the other characters, but is not visible in the current shot. They are in the next room, around a corner, or simply outside the frame.

The practical test: if the character could, in principle, walk into frame, it is O.S. If they are temporally or spatially elsewhere, it is V.O.

Part Four: The Camera — Visual Language

Camera terms are instructions to the director and cinematographer about how a scene should be photographed. They are a necessary part of the screenwriter's vocabulary — but they come with an important caveat that every new writer should understand before using them.

A spec script — a script written to demonstrate your craft and secure professional opportunities — is not a shooting script. It is a document addressed to readers, not to a camera crew. Using excessive camera directions in a spec script signals a writer who does not yet understand the distinction between the writer's job and the director's. The terms below are included because you will encounter them in professional scripts, in coverage notes, and in development conversations. Use them in your own work only when the specific shot is inseparable from the meaning of the scene.

CU / ECU (Close-Up / Extreme Close-Up)

A close-up frames a subject tightly — typically a face, a hand, or a significant object. An extreme close-up isolates a detail: an eye, a ring, a crack in the wall. Close-ups direct attention and carry emotional weight. Used sparingly in a spec script, they can indicate that a specific detail must be seen — but the instinct to call them on every significant moment should be resisted.

WIDE / ESTABLISHING SHOT

A wide shot shows a large field of view — a landscape, a city street, the full scope of a location. An establishing shot introduces a new location, orienting the audience to where and when the next scene takes place. Writers sometimes use ESTABLISHING SHOT at the opening of a scene to signal that the geography of the location needs to be clear before the action begins.

POV (Point of View)

A POV shot shows what a specific character sees from their own perspective — the camera occupies the character's eye-line. POV is used to place the audience inside a character's physical experience: the view through a sniper's scope, a child's-eye view of an adult argument, a driver's perspective in the seconds before a crash.

POV is one of the camera directions most appropriate for use in spec scripts, because in many cases the specific subjective perspective is a meaningful storytelling choice that the writer, not the director, should establish.

INTERCUT

INTERCUT — or INTERCUT WITH — indicates that a scene alternates between two locations simultaneously: a phone call between two characters in different places, a parallel sequence of events unfolding at the same moment. Once INTERCUT is established, the writer does not need to write a new slug line for every cut between the two locations.

MONTAGE

A montage is a sequence of brief shots that compress time or information — a training sequence, the passage of seasons, the deterioration of a relationship rendered in a series of small moments. A screenplay montage is written with a MONTAGE heading, followed by a series of short action lines, and concluded with END MONTAGE.

Montage is a powerful tool and a frequently misused one. A montage should accomplish something that cannot be accomplished in a conventional scene — it should compress what would otherwise take too long to show in real time. A montage used to avoid writing a difficult scene is a structural problem, not a solution.

SMASH CUT

A SMASH CUT is an abrupt, jarring transition — a deliberate collision between two shots that creates meaning through contrast or shock. The cut from something quiet to something loud, from something safe to something violent, from sleep to sudden waking. It is a rhetorical device, and like all rhetorical devices, it loses its force when overused.

Part Five: The Industry — Development and Production Terms

Once your script leaves your desk, it enters a professional context with its own vocabulary. These are the terms you will encounter in pitch meetings, in coverage reports, and in conversations with agents, managers, and development executives. Understanding them is part of understanding the industry your script is trying to enter.

Spec Script

A spec script — from "on speculation" — is a screenplay written without a commission, without a guarantee of payment, and without an existing attachment to a production. It is the fundamental unit of a screenwriter's career development. Spec scripts are written to demonstrate craft, to attract representation, and to show the industry what a writer can do.

The spec script is the document this entire glossary is designed to help you write correctly. Its format must be impeccable, its story compelling, and its voice distinct. It will be read, in most cases, by someone whose job is to find reasons to stop reading.

Shooting Script

A shooting script is a script that has been formally locked for production — numbered scenes, revision pages color-coded by draft, camera directions added by the director, and production notes embedded throughout. It is a working document for the crew, not a reading document for development.

The distinction between a spec script and a shooting script is important: the freedoms permitted in a shooting script — extensive camera direction, technical notation, production-specific detail — are not appropriate in a spec script. They are different documents with different audiences and different purposes.

Coverage

Coverage is the written evaluation of a script produced by a reader — a development assistant, a professional script analyst, or a literary manager — after they have read it. Standard coverage includes a synopsis of the script, an assessment of its premise, structure, characters, and dialogue, and a recommendation: Recommend, Consider, or Pass.

Most scripts submitted to production companies are read first by a reader, not by a producer or executive. Coverage is the filter through which a script must pass before it reaches a decision-maker. Understanding this is understanding the first audience your script will encounter.

Logline

A logline is a one-to-two sentence summary of a screenplay that conveys the protagonist, the central conflict, and the stakes. It is the first thing a producer, agent, or development executive will ask for, and the last thing most new writers feel comfortable writing.

A strong logline answers three questions: Who is the protagonist, and what is distinctive about them? What do they want, and what is standing in their way? What is at stake if they fail?

The logline is not a synopsis. It does not reveal the ending, and it does not summarize the plot. It sells the premise — the collision of character and situation that makes the story worth telling. A film about a man who tries to save his marriage is not a logline. A logline tells us who this man is, what specific situation his marriage is in, and what he will have to do — or give up — to save it.

Treatment

A treatment is a prose document — typically between two and twenty pages — that describes the story of a screenplay in narrative form, scene by scene, before the full script is written. Treatments are used in two contexts: as a development tool for the writer, to work out story problems before committing to a full draft; and as a selling document, to pitch a story to a producer or studio before the script exists.

A treatment is not a screenplay, and it is not a synopsis. It is a readable, present-tense prose narrative that makes the story feel alive without the formal architecture of a script.

Polish vs. Rewrite

A rewrite is a substantial revision of a screenplay — reworking structure, character, or story at a fundamental level. A polish is a lighter pass, addressing dialogue, tone, and specific scenes without altering the underlying architecture.

The distinction matters professionally because rewrites and polishes are compensated differently under Writers Guild of America agreements, and because producers and executives use the terms to signal the scale of revision they are requesting. When a producer says a script needs a polish, they are asking for refinement. When they say it needs a rewrite, they are asking for reconstruction.

Table Read

A table read is a rehearsal in which actors — sometimes cast, sometimes not — read a script aloud around a table while the writer, director, and producers listen. Table reads are used to identify problems that are invisible on the page: dialogue that cannot be spoken naturally, scenes that run too long, structural issues that only become apparent in performance.

For a new writer, attending a table read of your own work for the first time is an education that no amount of solo revision can replicate. The script you thought was finished will reveal itself to be something different — and almost always, the revelation is useful.

A Final Note

Terminology is not the point. The point is the story — the scene that lands, the character the audience cannot stop thinking about, the line of dialogue that says exactly the right thing in exactly the wrong moment. These terms are the tools. The work is what you build with them.

The most effective use of this glossary is to read it once, return to it when something in your script doesn't feel right, and otherwise set it aside. Then open a script you admire — one that has done something you want to do — and watch how these terms operate in practice. The vocabulary will become instinctive faster than you expect.