/ Dictionary / Index G gibber: Meaning and Definition of Find definitions for: gib•ber Pronunciation: (jib'ur, gib'-), [key] — v.i. to speak inarticulately or meaninglessly. to speak foolishly; chatter. —n. gibbering utterance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: gibber (Thesaurus) gibbed gibberellic acid Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language