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

 

disloyalty

 noun
noun
BrE BrE//dɪsˈlɔɪəlti//
 
; NAmE NAmE//dɪsˈlɔɪəlti//
 
[uncountable]disloyalty (to somebody/something)
 
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the quality of not being loyal or faithful to your friends, family, country, etc. She felt guilty of disloyalty to her dead husband.