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

Keep scrolling for more

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



Visit the Thesaurus for More 

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 agency has also found diseases known to occur in China, called pospiviroid and spindle tuber viroid, in seeds, as well as a few pests of significance: an immature wasp and a larval seed beetle. Jon Emont And Jesse Newman, WSJ, "Amazon Bans Foreign Plant Sales to U.S. Amid Global Seed Mystery," 5 Sep. 2020 Everything Kengor writes here would fit reasonably in a Catholic devotional book, but baldly asserting any of it in a political and intellectual history of Karl Marx and Communism is unprofessional and immature. Cameron Hilditch, National Review, "A Conservative’s Revisionist History Aims at Marx — and Misses the Mark," 3 Sep. 2020 A few weeks post-op, immature bone will have already started growing into the metal. Rob Verger, Popular Science, "I got my hip replaced at 39. Here’s why that might get more common.," 12 Mar. 2019 Their immature minds have one perspective: their own. Meghan Leahy, Washington Post, "My husband is telling our young children not to cry. Is this okay?," 26 Aug. 2020 Instead of shuttling around the world telling others to not use Huawei, the White House should work closely with allies to embrace and foster OpenRAN, a promising but still immature technology. Kevin Xu, Wired, "The Future of American Industry Depends on Open Source Tech," 26 Aug. 2020 China’s divide-and-conquer diplomacy abroad, particularly toward countries smaller than the U.S., is aggressive and immature. George P. Shultz, WSJ, "China Has Troubles of Its Own," 26 Aug. 2020 The dino suffered from osteosarcoma, which causes tumors of immature bone tissue, frequently in the leg, Science reported. National Geographic, "What we know about airborne coronavirus," 12 Aug. 2020 The speech, which Harris gave at the Renewing Communities Symposium on May 8, 2014, focused on forgiving the mistakes young people make during immature stages of their lives. Devon Link, USA TODAY, "Fact check: Video online of Kamala Harris calling young people 'stupid' is missing context," 17 Aug. 2020

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.

See More

First Known Use of immature

1548, in the meaning defined at sense 2

History and Etymology for immature

Latin immaturus, from in- + maturus mature

Keep scrolling for more

Learn More about immature

Time Traveler for immature

Time Traveler

The first known use of immature was in 1548

See more words from the same year

Statistics for immature

Last Updated

17 Sep 2020

Cite this Entry

“Immature.” Dictionary, Merriam-Webster, Accessed 25 Sep. 2020.

Keep scrolling for more

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

Keep scrolling for more

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).


Test Your Vocabulary

Challenging Vocabulary Quiz Returns!

  • stylized drawing of woman pole vaulting across gap to get trophy
  • Which is a synonym of fuliginous?
Spell It

Can you spell these 10 commonly misspelled words?

Syn City

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!