/ Dictionary / Index I intergalactic: Meaning and Definition of Find definitions for: in•ter•ga•lac•tic Pronunciation: (in"tur-gu-lak'tik), [key] — adj. of, existing, or occurring in the space between galaxies: The science-fiction movie was about an intergalactic war. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: intergalactic (Thesaurus) interfuse intergenerational Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language