/ Dictionary / Index G gargantuan: Meaning and Definition of Find definitions for: gar•gan•tu•an Pronunciation: (gär-gan'ch-un), [key] — adj. gigantic; enormous; colossal: a gargantuan task. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: gargantuan (Thesaurus) Gargantua garget Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language