Dictionary

infantile

adjective in·fan·tile \ˈin-fən-ˌtī(-ə)l, -təl, -ˌtēl, -(ˌ)til\

: annoying and childish : very silly in a way that is not appropriate or polite

medical : affecting babies or very young children

Full Definition of INFANTILE

1
:  of or relating to infants or infancy
2
:  suitable to or characteristic of an infant; especially :  very immature <infantile humor>
in·fan·til·i·ty \ˌin-fən-ˈti-lə-tē\ noun

Examples of INFANTILE

  1. <the infantile humor that teenage boys are justly famous for>

First Known Use of INFANTILE

1696

infantile

adjective in·fan·tile \ˈin-fən-ˌtīl, -təl, -ˌtēl, -(ˌ)til\   (Medical Dictionary)

Medical Definition of INFANTILE

1
:  of, relating to, or occurring in infants or infancy <infantile eczema>
2
:  suitable to or characteristic of an infant; especially :  very immature

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