/ Dictionary / Index T teaspoonful: Meaning and Definition of Find definitions for: tea•spoon•ful Pronunciation: (tē'spn-fool"), [key] — pl. -fuls. the amount a teaspoon can hold. a volumetric measure equal to fluid ounce (4.9 ml); tablespoonful. Abbr.: t., tsp. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: teaspoonful (Thesaurus) teaspoon teat Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language