/ Dictionary / Index S significant symbol: Meaning and Definition of Find definitions for: signif'icant sym'bol Pronunciation: [key] — Sociol. Sociol. a verbal or nonverbal gesture, as a word or smile, that has acquired a conventionalized meaning. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. significant other signification Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language