Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “immature”

immature

adjective uk   /ˌɪm.əˈtʃʊər/ us    /-ˈtʊr/
C2 disapproving not behaving in a way that is as calm and wise as people expect from someone of your age: Stop being so silly and immature, Ben! She's rather immature for her age, don't you think?Physically and mentally mature and immature disapproving not having much experience of something: politically immaturePhysically and mentally mature and immature specialized biology not yet completely grown or developed: While the animals are still immature, they do not breed.Physically and mentally mature and immature
immaturity
noun [U] uk   /-ˈtʃʊə.rɪ.ti/ us    /-ˈtʊr.ə.t̬i/
Physically and mentally mature and immature
(Definition of immature from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of immature?
Add Cambridge dictionaries to your browser to your website

Definitions of “immature” in other dictionaries

Word of the Day

beer mat

a small piece of cardboard that you put under a glass to protect a table surface in a pub or bar

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More