American English

Definition of shadowbox verb from the Oxford Advanced American Dictionary

 

shadowbox

 verb
verb
NAmE//ˈʃædoʊˌbɑks//
 
[intransitive]Verb Forms present simple I / you / we / they shadowbox he / she / it shadowboxes past simple shadowboxed -ing form shadowboxing
 
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to box with an imaginary opponent, especially for physical exercise or in order to train
shadowboxing
 
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noun [uncountable]