/ Dictionary / Index Y yellowfin tuna: Meaning and Definition of Find definitions for: yel'low•fin tu'na Pronunciation: (yel'ō-fin"), [key] an important food fish, Thunnus albacares, inhabiting warm seas. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. yellowfinch yellow flag Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language