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English definition of “disloyal”

disloyal

adjective     /ˌdɪsˈlɔɪ.əl/
C2 not supporting someone that you should support: His sisters thought that his autobiography was disloyal to the family. → Opposite loyalDisloyalty, betrayal and treason disloyalty     /-ti/ noun [U] They accused her of disloyalty.Disloyalty, betrayal and treason
(Definition of disloyal adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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