Definition of aerobics noun from the Oxford Advanced American Dictionary

 

aerobics

 noun
noun
NAmE//ɛˈroʊbɪks//
 
, NAmE//ə‑//
 
[uncountable]
 
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physical exercises intended to make the heart and lungs stronger, often done in classes, with music to do aerobics
See the Oxford Advanced Learner's Dictionary entry: aerobics