1. Plural of puerility; childish or immature behaviors, attitudes, or expressions.
Usage: Formal; often used in critical or disapproving contexts
2. Childish or trivial remarks, jokes, or statements.
Usage: Formal

Examples

• The critic dismissed the film's humor as nothing but puerilisms.
• His constant puerilisms made it difficult to take him seriously in professional meetings.
• The novel was filled with puerilisms that appealed only to young readers.
• She grew tired of his puerilisms and decided to end the friendship.
• The debate devolved into puerilisms rather than substantive arguments.
• Despite his age, he continued to indulge in puerilisms that embarrassed his family.