资料来源 : Webster's Revised Unabridged Dictionary (1913)

Precedented \Prec"e*dent*ed\, a.
   Having a precedent; authorized or sanctioned by an example of
   a like kind. --Walpole.

资料来源 : WordNet®

precedented
     adj : having or supported or justified by a precedent [ant: {unprecedented}]