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adulthood

noun [U]
 
 
/ˈæd.ʌlt.hʊd/ /əˈdʌlt-/

Definition

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 noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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