betray Definition in Cambridge American English Dictionary
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Definition of "betray" - American English Dictionary

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betrayverb [T]

 us   /bɪˈtreɪ/

betray verb [T] (BE NOT LOYAL)

to be not loyal to your country or to someone who believes you are loyal, often by doing something harmful: Some lawmakers say they feel betrayed by the president.

betray verb [T] (SHOW)

to show your feelings or thoughts without intending to: She could not help betraying her sympathy for us.
(Definition of betray from the Cambridge Academic Content Dictionary © Cambridge University Press)
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