Source : Webster's Revised Unabridged Dictionary (1913)

Castigatory \Cas`ti*ga*to*ry\, a. [L. castigatorius.]
   Punitive in order to amendment; corrective.

Castigatory \Cas"ti*ga*to*ry\, n.
   An instrument formerly used to punish and correct arrant
   scolds; -- called also a {ducking stool}, or {trebucket}.
   --Blacktone.