Immature

Adjective

Definitions

1.AdjectiveOccurring before the proper time; untimely, premature (especially of death). .mw-parser-output .defdate{font-size:smaller}

2.AdjectiveNot fully formed or developed; not grown.

3.AdjectiveChildish in behavior; juvenile.

"You're only young once, but you can be immature the rest of your life.; The man was immature for throwing a tantrum."

4.NounAn immature member of a species.

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