/ Dictionary / Index G galactic: Meaning and Definition of Find definitions for: ga•lac•tic Pronunciation: (gu-lak'tik), [key] — adj. of or pertaining to a galaxy. of or pertaining to the Milky Way. immense; huge; vast: a problem of galactic proportions. pertaining to or stimulating the secretion of milk. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: galactic (Thesaurus) galactan galactic cluster Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language