/ ˈmæstəbeɪt; NAmE -stərb-/ verb
1.
[ v ] to give yourself sexual pleasure by rubbing your sexual organs
2.
[ vn ] to give sb sexual pleasure by rubbing their sexual organs
► mas·tur·ba·tion / ˌmæstəˈbeɪʃn; NAmE -stərˈb-/ noun [ U ]
► mas·tur·ba·tory / ˌmæstəˈbeɪtəri; NAmE ˈmæstərbətɔːri/ adjective
••
WORD ORIGIN
mid 19th cent.: from Latin masturbat- masturbated, from the verb masturbari , of unknown origin.