Definition of Mata Hari noun from the Oxford Advanced Learner's Dictionary

 

Mata Hari

 noun
noun
BrE BrE//ˌmɑːtə ˈhɑːri//
 
; NAmE NAmE//ˌmɑːtə ˈhɑːri//
 
 
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an attractive female spy From the name of a Dutch dancer who worked as a spy for the German government during the First World War.
See the Oxford Advanced American Dictionary entry: Mata Hari