im·​ma·​ture | \ ˌi-mə-ˈtu̇r How to pronounce immature (audio) , -ˈtyu̇r, -ˈchu̇r How to pronounce immature (audio) \

Definition of immature

1a : exhibiting less than an expected degree of maturity emotionally immature adults
b : lacking complete growth, differentiation, or development immature fruits a sexually immature bird
c : having the potential capacity to attain a definitive form or state : crude, unfinished a vigorous but immature school of art
2 archaic : premature

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Other Words from immature

immature noun
immaturely adverb
immaturity \ ˌi-​mə-​ˈtu̇r-​ə-​tē How to pronounce immaturity (audio) , -​ˈtyu̇r-​ , -​ˈchu̇r-​ \ noun

Synonyms & Antonyms for immature



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Examples of immature in a Sentence

The flock included both adult and immature birds. His teachers have complained about his immature behavior.
Recent Examples on the Web The Vanderpump Rules cast is known for being a bit immature, and well, kind of ratchet. Olivia Harrison,, "Here’s Where All The Vanderpump Rules Cast Members Live," 8 Jan. 2020 Taking care of yourself is not immature or selfish. NBC News, "Diva or self-care icon? Adam Driver walkout prompts debate," 18 Dec. 2019 Wilms tumor, a solid cancerous growth of the kidney that arises from immature kidney cells, most often affects children who are 3 to 4 years old. San Antonio Express-News, "Becoming Bryce Strong," 31 Oct. 2019 My daughter is still a little immature in her culinary quests. Myrna Petlicki,, "Shout Out: Heath Schecter, a personal chef and author of ‘buttered noodles’ cookbook," 7 Oct. 2019 This tiny tick was identified as the immature stage of the deer tick, called Ixodes scapularis, similar to Europe’s sheep tick. Allen Steere,, "Lyme disease: How we discovered it and where we go from here," 22 Aug. 2019 Beetles emerge from the soil after changing from their immature stage of being grub worms. Neil Sperry,, "If you want more figs, don’t prune your trees," 2 Aug. 2019 These intersex fish had a mix of female and male genitals, and some males even began laying immature eggs. National Geographic, "THE BEST OF NATIONAL GEOGRAPHIC DELIVERED TO YOUR INBOX," 6 Dec. 2019 Is that immature defiance a product of his frustration in the moment or what Harbaugh really believes? Dan Wolken, USA TODAY, "Misery Index: When is Jim Harbaugh going to get it? Michigan's issues cut deeper than losses to Ohio State," 1 Dec. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'immature.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of immature

1548, in the meaning defined at sense 2

History and Etymology for immature

Latin immaturus, from in- + maturus mature

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Time Traveler for immature

Time Traveler

The first known use of immature was in 1548

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Statistics for immature

Last Updated

21 Jan 2020

Cite this Entry

“Immature.” The Dictionary, Merriam-Webster Inc., Accessed 23 January 2020.

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More Definitions for immature


How to pronounce immature (audio) How to pronounce immature (audio)

English Language Learners Definition of immature

: not fully developed or grown
: acting in a childish way : having or showing a lack of emotional maturity


im·​ma·​ture | \ ˌi-mə-ˈtu̇r How to pronounce immature (audio) , -ˈtyu̇r, -ˈchu̇r \

Kids Definition of immature

1 : not yet fully grown or ripe an immature bird immature fruit
2 : acting in or exhibiting a childish manner an immature teenager immature behavior

Other Words from immature

immaturely adverb


im·​ma·​ture | \ ˌim-ə-ˈt(y)u̇(ə)r also -ˈchu̇(ə)r \

Medical Definition of immature

: lacking complete growth, differentiation, or development immature blood cells emotionally immature

Other Words from immature

immaturely adverb
immaturity \ -​ˈt(y)u̇r-​ət-​ē also -​ˈchu̇r-​ \ noun, plural immaturities

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Comments on immature

What made you want to look up immature? Please tell us where you read or heard it (including the quote, if possible).


out of the ordinary or unreasonable

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