/ Dictionary / Index S self-opinion: Meaning and Definition of Find definitions for: self-o•pin•ion Pronunciation: (self'u-pin'yun, self"-), [key] — n. opinion of oneself, esp. when unduly high. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. self-operating self-opinionated Related Content Daily Word Quiz: illegible Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language