Definition of infantile
- infantile humor
the infantile humor that teenage boys are justly famous for
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'infantile.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
: annoying and childish : very silly in a way that is not appropriate or polite
medical : affecting babies or very young children
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