Entry 2 senses · 2 variants Webster, 1913 Castigatory · Cas·ti·ga·to·ry · IPA a. n. 01 a. Punitive in order to amendment; corrective. 1. Punitive in order to amendment; corrective. 02 n. An instrument formerly used to punish and correct arrant scolds; -- called also a ducking stool, or trebucket. 1. An instrument formerly used to punish and correct arrant scolds; -- called also a ducking stool, or trebucket. Also: ducking stool, trebucket