vow - definition and synonyms

noun 

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/vaʊ/
singularvow
pluralvows
  1. 1
    [countable] a serious promise
    make a vow (that):

    I’ve made a vow that I’m going to study harder.

    take a vow (of something):

    Nuns must take a vow of chastity.

     Synonyms and related words
  2. 2

    vows

    [plural] a set of promises that people make to each other, for example during a wedding ceremony
    exchange vows:

    The couple exchanged vows in a simple church ceremony.