Entry 2 senses · 2 variants Webster, 1913 Sudatory · Su·da·to·ry · IPA a. n. 01 a. Sweating; perspiring. 1. Sweating; perspiring. 02 n. A bagnio; a sweating bath; a vapor bath. pl. Sudatories ((#)) 1. A bagnio; a sweating bath; a vapor bath. “These sudatories are much in request for many infirmities.” — Evelyn.