Definition of castanets noun from the Oxford Advanced American Dictionary

 

castanets

 noun
noun
NAmE//ˌkæstəˈnɛts//
 
[plural]
 
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a musical instrument that consists of two small round pieces of wood that you hold in the hand and hit together with the fingers to make a noise. Castanets are used especially by Spanish dancers.
See the Oxford Advanced Learner's Dictionary entry: castanets