Definition of overfishing noun from the Oxford Advanced American Dictionary

 

overfishing

 noun
noun
NAmE//ˌoʊvərˈfɪʃɪŋ//
 
[uncountable]
 
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the process of taking so many fish from the ocean, a river, etc. that the number of fish in it becomes very low a shortage of tuna, caused by overfishing
See the Oxford Advanced Learner's Dictionary entry: overfishing