/ Dictionary / Index O opinion: Meaning and Definition of Find definitions for: o•pin•ion Pronunciation: (u-pin'yun), [key] — n. a belief or judgment that rests on grounds insufficient to produce complete certainty. a personal view, attitude, or appraisal. the formal expression of a professional judgment: to ask for a second medical opinion. the formal statement by a judge or court of the reasoning and the principles of law used in reaching a decision of a case. a judgment or estimate of a person or thing with respect to character, merit, etc.: to forfeit someone's good opinion. a favorable estimate; esteem: I haven't much of an opinion of him. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: opinion (Thesaurus) opinicus opinionated Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language