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

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

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

From The Wall Street Journal • May 1, 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

Herr Doctor Knie argues that Helmuth succumbed to the enemy propaganda because he was too immature to resist the temptation.

From "The Boy Who Dared" by Susan Campbell Bartoletti

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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