Source : Webster's Revised Unabridged Dictionary (1913)

Terminative \Ter"mi*na*tive\, a.
   Tending or serving to terminate; terminating; determining;
   definitive. --Bp. Rust. -- {Ter"mi*na*tive*ly}, adv. --Jer.
   Taylor.

Source : WordNet®

terminative
     adj : coming to an end; "a contract terminative with the end of
           the war"