/ Dictionary / Index T twin bill: Meaning and Definition of Find definitions for: twin' bill' Pronunciation: [key] — Sports. Sports. a doubleheader, as in baseball. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. twinberry twinborn Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language