/ Dictionary / Index T tailfirst: Meaning and Definition of Find definitions for: tail•first Pronunciation: (tāl'fûrst'), [key] — adv. with the tail or rear part foremost. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tail fin tailgate Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language