Definition from Wiktionary, the free dictionary
- The practices of sadism and masochism collectively, usually in reference to consensual practices within the BDSM community.
- Sadism and masochism in one person; the enjoyment by a person of both inflicting and receiving pain.
- Sadomasochism for sexual gratification.
Related terms 
practices of sadism and masochism collectively
sadism and masochism in one person
sadomasochism for sexual gratification