Definitions

immature

[im-uh-choor, -toor, -tyoor, -chur] / ˈɪm əˈtʃʊər, -ˈtʊər, -ˈtjʊər, -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.

While the Ivy League university grappled with its newly co-educational student body, Mr. Trudeau’s early cartoons played on the romantic failings of his stand-in, the immature Mike Doonesbury.

From The Wall Street Journal • Jun. 19, 2026

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

From Salon • Jun. 11, 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

It contains millions of "silent synapses," which are immature connections between neurons that remain inactive until they are needed to help form new memories.

From Science Daily • May 6, 2026

It did not seem just that these boisterous, immature young men should show up after all the work was done and be allowed to take possession of the most desirable tent on the island.

From "Catch-22" by Joseph Heller

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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