Definitions

immature

[im-uh-choor, -toor, -tyoor, -chur] / ˈɪm əˈtʃʊər, -ˈtʊər, -ˈtyʊər, -ˈtʃɜr /

ADJECTIVE

young, inexperienced

Synonyms

STRONGEST

childish premature

STRONG

green unfledged unripe

WEAK

adolescent baby babyish callow crude half-grown imperfect infantile infantine jejune juvenile kid kidstuff puerile raw sophomoric tender tenderfoot underdeveloped undergrown undeveloped unfinished unformed unseasonable unseasoned unsophisticated untimely wet behind ears youthful

Antonyms

STRONGEST

mature

WEAK

adult developed experienced grown old

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Sure, some immature viewers might have glommed onto the edgy comedy of yesteryear.

From Salon • Jun. 11, 2026

On a blind date, his descriptions of magical griffins and burning deserts sound humiliatingly immature.

From Los Angeles Times • Jun. 3, 2026

Dr Ernesto Maceira, a specialist who treated the Spaniard's foot, said the condition was caused by "abnormal forces that act on an immature bone" and attributed it to Nadal's intense training as a child.

From BBC • May 29, 2026

"At the time, the prevailing consensus was that the Nanotyrannus holotype skull represented an immature Tyrannosaurus rex, and was not a separate species," said Griffin, assistant professor of geosciences at Princeton.

From Science Daily • Apr. 15, 2026

Yeah, maybe it was just a stupid and immature school yard fight.

From "The Absolutely True Diary of a Part-Time Indian" by Sherman Alexie

Vocabulary lists containing immature

List 5

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Brown Girl Dreaming

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Made You Look: Synonyms for "Immature"

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