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

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

"When they're under 16, they're far too immature to deal with these massive issues that us as adults struggle with."

From BBC • May 25, 2026

Auden disavowed his poem “Spain 1937” as immature and “dishonest.”

From The Wall Street Journal • May 1, 2026

Maddy pushes me away and glances around the hallway to see if anyone noticed how immature I am.

From "A Place at the Table" by Saadia Faruqi and Laura Shovan

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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