Definition

Not fully developed or grown; showing a lack of maturity in behavior or thinking.

Example

His immature comments during the meeting made it hard for others to take him seriously.

Comparatives & Superlatives

Conversation

I can't believe how immature he acted at the party last night.

Right? It was so embarrassing for everyone involved.

I thought we all agreed to leave the drama behind us.

Exactly! It's time for him to grow up and stop being so immature.

Synonyms & Antonyms

Root Explanation

Immature → It is formed from "in-" (meaning not) and "maturus" (meaning ripe or fully developed). The word "immature" describes something that is not fully developed or lacking maturity.

Memory Tip

Think of 'not' ('in-') being combined with 'ripe' ('maturus') to remember that 'immature' means not fully developed.

Visually Confused Words