/ Dictionary / Index G gang-up: Meaning and Definition of Find definitions for: gang-up Pronunciation: (gang'up"), [key] — n. an act of ganging up or uniting in opposition to someone or something. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: gang-up (Thesaurus) gangue gangway Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language