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English definition of “undertaking”

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undertaking

noun [C] uk   /ˌʌn.dəˈteɪ.kɪŋ/ us    /ˈʌn.dɚˌteɪ.kɪŋ/

undertaking noun [C] (JOB)

C2 a job, business, or piece of work: The construction of the tunnel is a large and complex undertaking.

undertaking noun [C] (PROMISE)

formal a formal promise: [+ that] formal The manager gave a written undertaking that no one would lose their job.
(Definition of undertaking from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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