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

 

backstroke

 noun
noun
BrE BrE//ˈbækstrəʊk//
 
; NAmE NAmE//ˈbækstroʊk//
 
(British English also backcrawl)[uncountable, singular] Swimming
 
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a style of swimming in which you lie on your back Can you do (the) backstroke? He won the 100 metres backstroke (= the race). See related entries: Swimming
See the Oxford Advanced American Dictionary entry: backstroke