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verb [transitive] American English pronunciation: betray /bɪˈtreɪ/ 
Word Forms
present tense
present participlebetraying
past tensebetrayed
past participlebetrayed
  1. 1
    if you betray your country, or if you betray someone who needs your support, you deliberately do something that harms them or helps their opponents

    In wartime many people accused of betraying their country were executed.

    She realized that one of her friends must have betrayed her.

    1. a.
      if you betray someone's trust, you do harm to them when they have trusted you

      They felt their assistant had betrayed their trust in publishing his diaries.

  2. 3
    to show something or give a sign of something

    Rabbits betray their presence with fresh soil outside their burrow.

    1. a.
      if you betray a feeling or quality that you want to hide or that you are not aware of, your words or face make it clear to people

      His comments betray a lack of understanding.

      The woman's face betrayed no emotion.

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noun [countable]
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a small digital image … which is used in electronic communication to express emotion or other simple concepts

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a complete failure

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major on (doing) sth

to have or do a lot of something; to focus on a particular thing

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