Meaning of “disloyal” in the English Dictionary

"disloyal" in British English

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disloyaladjective

uk /ˌdɪsˈlɔɪ.əl/ us /ˌdɪsˈlɔɪ.əl/

(Definition of “disloyal” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"disloyal" in American English

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disloyaladjective

us /dɪsˈlɔɪ·əl/

not loyal; acting to hurt someone you are expected to support:

His sisters thought that his autobiography was disloyal to the family.

(Definition of “disloyal” from the Cambridge Academic Content Dictionary © Cambridge University Press)