/ Dictionary / Index T tref: Meaning and Definition of Find definitions for: tref Pronunciation: (trāf), [key] — adj. unfit to be eaten or used, according to religious laws; not kosher. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tref (Thesaurus) tree yucca treflé Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language