/ Dictionary / Index W well-defined: Meaning and Definition of Find definitions for: well-de•fined Pronunciation: (wel'di-fīnd'), [key] — adj. sharply or clearly stated, outlined, described, etc.: a well-defined character; a well-defined boundary. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: well-defined (Thesaurus) well-content well-disposed Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language