Meaning of the word puerile in English

What does puerile mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

puerile

US /ˈpjuː.ɚ.ɪl/
UK /ˈpjʊə.raɪl/

Adjective

childishly silly and immature

Example:
His behavior at the meeting was utterly puerile.
I can't believe you're still making such puerile jokes.