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English definition of “puerile”

puerile

adjective uk   /ˈpjʊə.raɪl/ us    /ˈpjʊr.ɪl/ disapproving
behaving in a silly way, not like an adult: I find his sense of humour rather puerile.Physically and mentally mature and immatureStupid and sillyOf unsound mind
puerility
noun [U] uk   /pjʊəˈrɪl.ɪ.ti/ us    /pjʊrˈɪl.ə.t̬i/
(Definition of puerile from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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