How do writers use definition and description to develop and advance an argument?
Topic 6.1 Definition and Description as Development: use definition and description as methods of development that advance an argument, not just decorate it.
A focused answer to AP English Language Topic 6.1, covering definition and description as methods of development, how defining a key term can be a persuasive move, how concrete description supports an argument, and how to analyze these methods rather than just label them.
Reviewed by: AI editorial process; not yet individually human-reviewed
Have a quick question? Jump to the Q&A page
Jump to a section
What this topic is asking
Topic 6.1 (skill REO-1.D) opens Unit 6, which treats the methods of development as tools that advance an argument. It asks you to use, and analyze, two of them: definition and description. Both look like neutral background, but both are strategic. Defining a key term sets the ground the argument is fought on, and concrete description makes an abstraction felt. The skill is to see, and to use, these methods as argumentative moves rather than decoration.
Methods of development
Unit 6 takes the methods you met earlier and asks you to use them deliberately and read them critically. Each method does a specific job; the writer's choice of method is itself a rhetorical decision.
Definition as a persuasive move
Defining a key term looks neutral but rarely is. In any contested argument, the definition of the central word, harm, freedom, fairness, success, often decides the outcome. A writer who gets the audience to accept a definition has won much of the argument before the evidence begins.
Description as support
Description renders a subject in concrete, sensory detail. Its argumentative work is to make an abstraction real: statistics about poverty become an argument the audience feels when a writer describes a single cold room. Description supports the argument by closing the distance between an idea and the reader's experience of it.
Why this matters for the exam
Definition and description are common methods in the passages set for rhetorical analysis (Question 2), where you must analyze how a writer's choices achieve a purpose. They are also tools for your own argument and synthesis essays: defining your key term on your own terms is a powerful early move, and apt description can make your evidence land. On the multiple choice section, reading questions ask you to identify the function of a definition or a descriptive passage in an argument.
Try this
Q1. Why is defining a contested term a persuasive move rather than neutral background? [Recall]
- Cue. Because whoever defines the key term shapes what counts and what does not, and so often controls the conclusion; in a contested argument the definition can decide the outcome before the evidence is even presented.
Q2. A writer arguing for stronger environmental rules opens by describing a single dried-up riverbed in vivid detail before any statistics. Explain how the description works as a method of development. [Short explanation]
- Cue. The description renders an abstract issue (environmental decline) concrete and sensory, so the audience feels the loss before encountering the data. It advances the argument by closing the distance between an idea and the reader's experience, making the later statistics land on an audience already emotionally invested, so the description supports the purpose rather than merely decorating the essay.
Exam-style practice questions
Practice questions written in the style of College Board exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
AP 2024 (multiple choice, style)1 marksA writer arguing about free speech spends a paragraph defining what 'harm' means before arguing which speech should be limited. This use of definition primarily serves to (A) pad the essay (B) set the terms on which the rest of the argument will turn (C) introduce a counterargument (D) cite an authority (E) shift the tone.Show worked answer →
Answer: (B). The skill is reading definition as a method of development.
By defining "harm" first, the writer fixes the terms the argument depends on; whoever defines the key word shapes the conclusion. Definition here is a strategic move, not filler.
Why not the others: (A) it does real work; (C) no opposing view is raised; (D) no authority is cited; (E) tone is not the point.
Markers reward students who explain how defining a contested term advances the argument.
AP 2023 (rhetorical analysis, style)6 marksThe passage below develops its argument largely through definition and vivid description. Write an essay that analyzes how the writer uses these methods of development to achieve a purpose.Show worked answer →
Free Response Question 2 (rhetorical analysis), 6-point rubric (1 thesis, 4 evidence and commentary, 1 sophistication).
The prompt names the methods, so your analysis must show how they advance the argument.
Thesis (1 point): claim how definition and description serve the purpose.
Evidence and commentary (4 points): show how defining a key term frames the issue and how concrete description makes an abstraction felt, explaining the effect of each.
Sophistication (1 point): trace how the definition set early governs the description and argument that follow.
The essay rewards analysis of method as argument, not a label of "the writer uses description."
Related dot points
- Topic 6.2 Exemplification and Illustration: develop an argument through well-chosen, representative examples, and analyze how a writer's examples advance a purpose.
A focused answer to AP English Language Topic 6.2, covering exemplification as a method of development, what makes an example representative rather than cherry-picked, the difference between a single extended example and several brief ones, and how to analyze and use examples.
- Topic 2.3 Methods of Development: identify and use methods of development - the organizational strategies (narration, comparison, cause and effect, and others) that structure an argument.
A focused answer to AP English Language Topic 2.3, covering the common methods of development (narration, description, comparison and contrast, cause and effect, definition, problem and solution), how they organize a line of reasoning, and how to choose the method that fits the purpose.
- Topic 6.5 Choosing and Combining Methods: select the methods of development that best fit an argument, and combine them so each does a distinct job.
A focused answer to AP English Language Topic 6.5, covering how to choose the right method of development for a given argumentative job, how writers combine methods in a single text, why the choice of method is itself rhetorical, and how to analyze mixed methods.
- Topic 4.6 Word Choice and Diction: analyze how a writer's diction - word choice and connotation - conveys tone and advances purpose, and make deliberate word choices in your own writing.
A focused answer to AP English Language Topic 4.6, covering what diction is, the difference between denotation and connotation, how word choice creates tone and advances purpose, the register of diction (formal to colloquial), and how to analyze and use diction without simply labelling it.
- Topic 1.2 Identifying Claims: identify and explain the claims an argument makes, and distinguish claims of fact, value, and policy.
A focused answer to AP English Language Topic 1.2, covering what a claim is, the difference between claims of fact, value, and policy, how to tell a claim from evidence, and how to locate the main and supporting claims in an argument.
Sources & how we know this
- AP English Language and Composition Course and Exam Description — College Board (2020)