Webster’s Revised Unabridged Dictionary · 1913
Decretory
Dec′re·to·ry (dĕk′rē·tō·ry̆), a. [L. decretorius, from decretum. See Decree.] 1. Established by a decree; definitive; settled.
The decretory rigors of a condemning sentence. South.
2. Serving to determine; critical. "The critical or decretory days." Sir T. Browne.