immature

adjective

im·​ma·​ture ˌi-mə-ˈchu̇r How to pronounce immature (audio) -ˈtu̇r How to pronounce immature (audio)
-ˈtyu̇r
1
a
: 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
immature noun
immaturely adverb
immaturity
ˌi-mə-ˈchu̇r-ə-tē How to pronounce immature (audio)
-ˈtu̇r-
-ˈtyu̇r-
noun

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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Manipulative or emotionally immature individuals end up exploiting this belief with ease. Mark Travers, Forbes.com, 7 June 2025 Nikki, who can be messy and loud and immature, doesn’t always handle that intensity with grace. Kate Erbland, IndieWire, 19 May 2025 Several groups of insects – sawflies, wasps, beetles, flies, and moths – contain species whose immature stages create leaf mines. Miri Talabac, Baltimore Sun, 8 May 2025 Stem cells are immature cells that can develop into many different cell types — including neurons that make dopamine. Jon Hamilton, NPR, 17 Apr. 2025 See All Example Sentences for immature

Word History

Etymology

Latin immaturus, from in- + maturus mature

First Known Use

1548, in the meaning defined at sense 2

Time Traveler
The first known use of immature was in 1548

Browse Nearby Words

Cite this Entry

“Immature.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/immature. Accessed 12 Jun. 2025.

Kids Definition

immature

adjective
im·​ma·​ture ˌim-ə-ˈt(y)u̇(ə)r How to pronounce immature (audio)
1
: not mature or fully developed : young, unripe
an immature bird
immature fruit
2
: showing less than an expected degree of maturity
immature behavior
immaturely adverb

Medical Definition

immature

adjective
im·​ma·​ture
ˌim-ə-ˈt(y)u̇(ə)r also -ˈchu̇(ə)r
: lacking complete growth, differentiation, or development
immature blood cells
emotionally immature
immaturely adverb
immaturity
-ˈt(y)u̇r-ət-ē also -ˈchu̇r-
noun
plural immaturities

More from Merriam-Webster on immature

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