/ Dictionary / Index T T-bill: Meaning and Definition of Find definitions for: T-bill Pronunciation: (tē'bil"), [key] — n. a U.S. Treasury bill. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: t-bill (Thesaurus) Tbilisi T.B.O. Related Content Daily Word Quiz: candor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language