Answer:
Q1: Meaning — A definition is a clear statement that fixes the meaning of a word or phrase by specifying its essential properties or the conditions under which the term applies.
Q2: Types — Common types of definitions include:
- Lexical (descriptive): reports how a word is actually used. Example: “Bird — a warm‑blooded, egg‑laying vertebrate with feathers.”
- Stipulative: assigns a new or specific meaning for a term for the sake of discussion. Example: “For this paper, ‘small business’ means firms with fewer than 50 employees.”
- Precising (or regulatory): sharpens a vague term to remove ambiguity. Example: “ ‘Late’ means arriving more than 10 minutes after the scheduled time.”
- Theoretical (or substantive): defines a term by referencing a theory or underlying structure. Example: “Intelligence — the capacity for goal‑directed adaptive behavior (per a given theory).”
- Operational: defines a term in terms of the operations or measurements used to detect it. Example: “Depression — a score ≥ 20 on the Beck Depression Inventory.”
- Persuasive (or emotive): loaded to influence attitudes rather than neutrally describe. Example: “Tax relief” vs “tax cut.”
- Ostensive/Enumerative: defines by pointing to examples (ostensive) or listing members (enumerative).
Q3: Purposes — Why we define:
- Clarify communication and avoid ambiguity.
- Establish criteria for classification, measurement, or analysis.
- Facilitate argumentation and avoid equivocation in reasoning.
- Create working meanings for research, law, policy, or experiments.
- Introduce or limit terminology for specific contexts (stipulation).
- Persuade or frame an issue (rhetorical use).
Explanation:
Definitions fix meanings so speakers and readers can reason consistently. Choose the type based on purpose: use lexical to report ordinary use, stipulative to set a convention, precising/operational to enable measurement, and theoretical to connect terms to explanations.
Steps:
- Identify your purpose (clarify, measure, theorize, persuade).
- Choose an appropriate type (lexical, stipulative, operational, etc.).
- State essential criteria (necessary and jointly sufficient conditions) or explicit procedures/examples.
- Check for ambiguity, circularity, and unintended scope.