Enthusiasm for inflicting pain, suffering, or humiliation on others; spec. a psychological disorder characterized by sexual fantasies, urges, or…

The urge to derive pleasure, esp. sexual gratification, from one's own pain or humiliation; the pursuit of such pleasure. Also in weakened sense…

The practice of deriving pleasure, esp. sexual pleasure, from pain inflicted on oneself or others; the urge or tendency to derive pleasure in…

Sexual desire or activity regarded as psychologically unhealthy or abnormal; spec. sadomasochism. Obsolete. rare.

Psychological tendency or (esp. sexual) practice characterized by both sadism and masochism. Also in extended use.

sadism and masochism, sado-masochism.

domination (also dominance) and submission.