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.
There are three immature stages that are black and white, with the fourth stage being red, black and white before becoming adults later in the summer. Kaycee Sloan, The Enquirer, 14 July 2025 To be effective the spray has to cover the immature stages. Tom MacCubbin, The Orlando Sentinel, 5 July 2025 Tomatoes must reach their mature size before harvesting, as immature green tomatoes will never ripen. Kim Toscano, Southern Living, 5 July 2025 Each follicle holds an immature egg and cells that support the egg's development. Karina Zaiets, USA Today, 30 June 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 19 Jul. 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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