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

 

attenuation

 noun
noun
BrE BrE//əˌtenjʊˈeɪʃn//
 
; NAmE NAmE//əˌtenjʊˈeɪʃn//
 
[uncountable](formal)
 
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the action of making something weaker or less effective the attenuation of the radar signal