DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Tref \Tref\ (tr[e^]f), a. [Yiddish, fr. Heb. t[e^]r[=e]ph[=a]h
      an animal torn by wild beasts.]
      Ceremonially unclean, according to the Jewish law; -- opposed
      to kosher.
      [Webster 1913 Suppl.]