- interaction, especially sexual activity, in which one person enjoys inflicting physical or mental suffering on another person, who derives pleasure from experiencing pain.
- gratification, especially sexual, gained through inflicting and receiving pain; sadism and masochism combined. Abbreviations: S&M, S and M
- the combination of sadistic and masochistic elements in one person, characterized by both aggressive and submissive periods in relationships with others
- sexual practice in which one partner adopts a sadistic role and the other a masochistic one
