Definition of wiretapping noun from the Oxford Advanced American Dictionary

 

wiretapping

 noun
noun
NAmE//ˈwaɪərˌtæpɪŋ//
 
[uncountable]
 
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the act of secretly listening to other people's telephone conversations by attaching a device to the telephone line
 
verb wiretap something
 
noun the use of illegal wiretaps see also tap
See the Oxford Advanced Learner's Dictionary entry: wiretapping