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function

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noun British English pronunciation: function /ˈfʌŋkʃ(ə)n/ 
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singularfunction
pluralfunctions
  1. 1
    [countable/uncountable] the job that something is designed to do

    The function of advertising is to create a unique image for your company.

    perform a function:

    All the backup systems performed their function flawlessly.

  2. 2
    [countable/uncountable] something that happens in your body, or something that a part of your body does

    He has no muscle function in his upper arms.

    Free radicals have the ability to disrupt bodily functions.

  3. 3
    [countable] a social event such as a party, especially one for a large number of people

    I sometimes attend official functions with my wife.

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