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certification /ˌsɚtəfəˈkeɪʃən/  

  • noun
    plural -tions
    [noncount] :the act of making something official :the act of certifying something
    the certification of the vote
    She had to wait until her certification as a nurse before she could start her new job.
    official approval to do something professionally or legally [count]
    instructor certification
    The school offers scuba diving certification.