immature

adjective
im·​ma·​ture | \ ˌi-mə-ˈtu̇r , -ˈtyu̇r, -ˈchu̇r \

Definition of immature

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

Keep scrolling for more

Other Words from immature

immature noun
immaturely adverb
immaturity \ ˌi-​mə-​ˈtu̇r-​ə-​tē , -​ˈtyu̇r-​ , -​ˈchu̇r-​ \ noun

Synonyms & Antonyms for immature

Synonyms

adolescent, juvenile, young, youngish, youthful

Antonyms

adult, grown-up, mature, matured

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

Screening out immature and abusive workers is a hard task for companies One contributor to the receipts problem is that businesses can’t weed out every bad apple during the hiring process. Nadra Nittle, Vox, "Racial slurs and fat-shaming insults keep popping up on receipts. Is Trump worsening the trend?," 29 Oct. 2018 But the coal industry argued in court that these technologies are too expensive and immature to deploy at scale, so the new standard is too difficult to meet. Umair Irfan, Vox, "The EPA plans to lift greenhouse gas limits on coal power plants," 6 Dec. 2018 While Wilhelm’s militarism and bellicosity aren’t defensible, any parallels to Donald Trump have to be limited to behavioral flaws: emotional, prone to anger, sometimes rash and perhaps even a little immature. WSJ, "Comparison Unfair to Wilhelm II and Trump," 11 Nov. 2018 Here's the deal: Children tend to have much finer hair than adults, and since hair dye and bleach can be damaging, a child's immature hair is much more susceptible to damage. Sam Escobar, Good Housekeeping, "How Young Is Too Young to Dye Your Kid's Hair?," 15 Oct. 2018 The secondary villains are the immature, misogynist tech bros who take advantage of Michael. Alex Abad-santos, Vox, "American Horror Story: Apocalypse was somehow both absolutely nuts and largely forgettable," 18 Nov. 2018 Consider popular Instagram accounts like @chicksinthewild, which has 679,000 followers, or @totalfratmove, which has 1.5 million followers, which often illustrate women as immature, clueless, and just plain stupid. Lily Genovese, Glamour, "8 Things You Should Know About High School Feminists," 7 Aug. 2018 The ultimate goal was to turn immature base metals like lead into higher metals like gold by releasing their perfect state, or quintessence. Meg Neal, Popular Mechanics, "The Eternal Quest for Aether, the Cosmic Stuff That Never Was," 19 Oct. 2018 By extracting a woman’s ovarian tissue prior to cancer therapy and stripping it of malignant cells, Pors was able to preserve enough functionality to support the growth and maintenance of human follicles, which carry immature eggs. Katherine J. Wu, Smithsonian, "How Artificial Ovaries Could Expand Fertility Options For Chemo Patients," 5 July 2018

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 1

History and Etymology for immature

Latin immaturus, from in- + maturus mature

Keep scrolling for more

Learn More about immature

Statistics for immature

Last Updated

21 Jan 2019

Look-up Popularity

Time Traveler for immature

The first known use of immature was in 1548

See more words from the same year

Keep scrolling for more

More Definitions for immature

immature

adjective

English Language Learners Definition of immature

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

immature

adjective
im·​ma·​ture | \ ˌi-mə-ˈtu̇r , -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

immature

adjective
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

More from Merriam-Webster on immature

Rhyming Dictionary: Words that rhyme with immature

Thesaurus: All synonyms and antonyms for immature

Spanish Central: Translation of immature

Nglish: Translation of immature for Spanish Speakers

Britannica English: Translation of immature for Arabic Speakers

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).

WORD OF THE DAY

irregularly rounded

Get Word of the Day daily email!

Test Your Vocabulary

What did you just call me?! A Quiz

  • rows-of-various-emoji
  • If a member of the audience describes your speech as bombastic, does that person mean it is:
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Syn City

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

TAKE THE QUIZ

Love words? Need even more definitions?

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