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

 

depletion

 noun
noun
BrE BrE//dɪˈpliːʃn//
 
; NAmE NAmE//dɪˈpliːʃn//
 
[uncountable](formal)
 
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the reduction of something by a large amount so that there is not enough left ozone depletion the depletion of fish stocks