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undertaking

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noun British English pronunciation: undertaking /ˈʌndə(r)ˌteɪkɪŋ/ 
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singularundertaking
pluralundertakings

Related dictionary definitions

  1. 1
    [countable] something difficult or complicated that you do

    Organizing a wedding is a major undertaking.

  2. 2
    [countable] formal a promise, or an agreement

    He was required to give a written undertaking not to disclose the details of their contract.

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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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