/ Dictionary / Index Y yellowtail: Meaning and Definition of Find definitions for: yel•low•tail Pronunciation: (yel'ō-tāl"), [key] — pl. -tails, -tail. a game fish, Seriola lalandei, of California. Also calleda small West Indian snapper, Ocyurus chrysurus. See any of several other fishes with a yellow caudal fin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: yellowtail (Thesaurus) yellow streak yellowtail flounder Related Content Daily Word Quiz: verdant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language