/ Dictionary / Index G goo: Meaning and Definition of Find definitions for: goo Pronunciation: (g), [key] — n. Informal. a thick or sticky substance: Wash that goo off your hands. maudlin sentimentality. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: goo (Thesaurus) gonzo goober 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