Definition of scuba diving noun from the Oxford Advanced American Dictionary

 

scuba diving

 noun
noun
NAmE//ˈskubə ˌdaɪvɪŋ//
 
(also scuba)[uncountable]
 
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the sport or activity of swimming underwater using special breathing equipment consisting of a container of air that you carry on your back and a tube through which you breathe the air to go scuba diving
See the Oxford Advanced Learner's Dictionary entry: scuba diving