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.

In recent years, however, scientists have also linked it to brain protection and neuronal differentiation, the process by which immature neural cells become functioning neurons.

From Science Daily • May 27, 2026

Parvovirus, also known as slapped cheek syndrome, is usually harmless to children but Arthur was extremely unwell because of his immature immune system.

From BBC • Apr. 21, 2026

The Army itself advises soldiers to “maintain the high ground,” and research shows that rapid-fire calls made under pressure by the morally immature lead to disaster.

From Slate • Apr. 13, 2026

“They are so delightfully immature that I felt like they were my cousins,” he says.

From Los Angeles Times • Apr. 7, 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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Made You Look: Synonyms for "Immature"

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