/ Dictionary / Index C capful: Meaning and Definition of Find definitions for: cap•ful Pronunciation: (kap'fool), [key] — pl. -fuls. the amount that a cap will hold. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: capful (Thesaurus) Cape York Peninsula cap gun Related Content Daily Word Quiz: jaundice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language