Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

immature

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

Simple Definition of immature

  • : not fully developed or grown

  • : acting in a childish way : having or showing a lack of emotional maturity

Source: Merriam-Webster's Learner's Dictionary

Full Definition of immature

  1. 1 archaic :  premature

  2. 2 a :  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>

immature

noun

immaturely

adverb

immaturity

play \-ˈtu̇r-ə-tē, -ˈtyu̇r-, -ˈchu̇r-\ noun

Examples of immature in a sentence

  1. The flock included both adult and immature birds.

  2. His teachers have complained about his immature behavior.



Origin and Etymology of immature

Latin immaturus, from in- + maturus mature


First Known Use: 1548


IMMATURE Defined for Kids

immature

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

Definition of immature for Students

  1. 1 :  not yet fully grown or ripe <an immature bird> <immature fruit>

  2. 2 :  acting in or exhibiting a childish manner <an immature teenager> <immature behavior>

immaturely

adverb



Medical Dictionary

immature

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

Medical Definition of immature

  1. :  lacking complete growth, differentiation, or development <immature blood cells> <emotionally immature>

immaturely

adverb

immaturity

\-ˈt(y)u̇r-ət-ē also -ˈchu̇r-\play noun plural

immaturities





Seen and Heard

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

a simplified speech bridging languages

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

confounded-person

Which is a synonym of indolent?

melancholy philistine frenetic lazy
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ