/ Dictionary / Index D define: Meaning and Definition of Find definitions for: de•fine Pronunciation: (di-fīn'), [key] — v. -fined, -fin•ing. —v.t. to state or set forth the meaning of (a word, phrase, etc.): They disagreed on how to define “liberal.” to explain or identify the nature or essential qualities of; describe: to define judicial functions. to fix or lay down definitely; specify distinctly: to define one's responsibilities. to determine or fix the boundaries or extent of: to define property with stakes. to make clear the outline or form of: The roof was boldly defined against the sky. —v.i. to set forth the meaning of a word, phrase, etc.; construct a definition. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: define (Thesaurus) defile definiendum Related Content Daily Word Quiz: modify Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language