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English definition of “adulthood”

adulthood

noun [U] uk   /ˈæd.ʌlt.hʊd/ /əˈdʌlt-/ us  
the part of someone's life when they are an adult: People in England legally reach adulthood at 18. Responsibility, I suppose, is what defines adulthood.Stages of life
(Definition of adulthood from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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