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

 

callisthenics

 noun
(British English)(North American English calisthenics)noun
BrE BrE//ˌkælɪsˈθenɪks//
 
; NAmE NAmE//ˌkælɪsˈθenɪks//
 
[uncountable + singular or plural verb]
 
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physical exercises intended to develop a strong and attractive body Word Origin early 19th cent.: from Greek kallos ‘beauty’ + sthenos ‘strength’ + -ics.