adj
immature
ih-muh-TYOOR
adj
1
Behaving in a childish or emotionally undeveloped way.
"His immature jokes annoyed the rest of the office."
"She realized it was immature to hold a grudge over something so small."
2
Not yet fully grown or developed.
"The immature fruit was still green and hard."
How to Use Immature
Learner’s notesIn plain EnglishNot fully grown up — either physically undeveloped, or acting in a childish way for one's age.
Easily confused with
Word Forms
more immature comparative, immatures plural, most immature superlative
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Etymology
From Latin immaturus, formed from "im-" ("not") plus maturus ("ripe").