/ Dictionary / Index G glassful: Meaning and Definition of Find definitions for: glass•ful Pronunciation: (glas'fool, gläs'-), [key] — pl. -fuls. an amount contained by or sufficient to fill a glass or tumbler. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: glassful (Thesaurus) glassfish glass gall Related Content Daily Word Quiz: loquacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language