betray Meaning in the Cambridge English Dictionary
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Meaning of “betray” in the English Dictionary

"betray" in British English

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betrayverb [T]

uk   us   /bɪˈtreɪ/

betray verb [T] (NOT LOYAL)

B2 to not be ​loyal to ​yourcountry or a ​person, often by doing something ​harmful such as ​helpingtheirenemies: He was ​accused of betraying his ​country during the ​war. She ​felt betrayed by her mother's ​lack of ​support. For ​years they betrayed the UK's ​secrets to Russia.formal He ​promised never to betray his ​wife (= never to ​leave her for another ​person). formal If someone betrays something such as a ​promise, they do not do what they ​promised: The ​president has been ​accused of betraying his ​electionpromises. By ​staying out so late, they have betrayed my ​trust (= ​disappointed me because I had ​trusted them not to).
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betray verb [T] (SHOW)

to show ​feelings, ​thoughts, or a ​particularcharacteristic without ​intending to: If he is ​nervous on ​stage, he does not betray it. Although she often ​seemsquitecold, her ​smilingeyes betray her ​truenature.
(Definition of betray from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"betray" in American English

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betrayverb [T]

 us   /bɪˈtreɪ/

betray verb [T] (BE NOT LOYAL)

to be not ​loyal to ​yourcountry 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 ​yourfeelings 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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