/ Dictionary / Index C cupful: Meaning and Definition of Find definitions for: cup•ful Pronunciation: (kup'fool), [key] — pl. -fuls. the amount a cup can hold. a volumetric measure equal to 8 fluid ounces (237 milliliters); half pint. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cupful (Thesaurus) cupflower cup fungus Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language