/ Dictionary / Index T tankful: Meaning and Definition of Find definitions for: tank•ful Pronunciation: (tangk'fool), [key] — pl. -fuls. the amount a tank can hold. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tankful (Thesaurus) tank fighter tank locomotive Related Content Daily Word Quiz: digression Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language