English

Definition of disloyal adjective from the Oxford Advanced Learner's Dictionary

 

disloyal

 adjective
adjective
BrE BrE//dɪsˈlɔɪəl//
 
; NAmE NAmE//dɪsˈlɔɪəl//
 
 
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disloyal (to somebody/something) not loyal or faithful to your friends, family, country, etc. He was accused of being disloyal to the government. a disloyal remark It was very disloyal of you to repeat what I’d said to Peter. Word Origin late 15th cent.: from Old French desloial, from des- (expressing negation) + loial ‘loyal’.
See the Oxford Advanced American Dictionary entry: disloyal