Definition of sadist noun from the Oxford Advanced Learner's Dictionary

 

sadist

 noun
noun
BrE BrE//ˈseɪdɪst//
 
; NAmE NAmE//ˈseɪdɪst//
 
 
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a person who gets pleasure, especially sexual pleasure, from hurting other people Word Origin late 19th cent.: from French sadisme, from the name of the Marquis de Sade.
See the Oxford Advanced American Dictionary entry: sadist