Definition of infantile adjective from the Oxford Advanced American Dictionary

     

    infantile

     adjective
    adjective
    NAmE//ˈɪnfənˌtaɪl//
     
     
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  1. 1(disapproving) typical of a small child (and therefore not suitable for adults or older children) synonym childish infantile jokes
  2. 2 [only before noun] (formal) connected with babies or very young children
See the Oxford Advanced Learner's Dictionary entry: infantile