Pronunciation: (sā"dō-mas'u-kiz"um, -maz'-, sad"ō-),[key] —n. 1. interaction, esp. sexual activity, in which one person enjoys inflicting physical or mental suffering on another person, who derives pleasure from experiencing pain.
2. gratification, esp. sexual, gained through inflicting or receiving pain; sadism and masochism combined. Abbr.: S-M, S and M