immature
adjective
im·ma·ture
ˌi-mə-ˈchu̇r 
-ˈtu̇r
-ˈtu̇r
-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
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
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
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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
Cite this Entry
“Immature.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/immature. Accessed 12 Jun. 2025.
Copy CitationKids Definition
immature
adjective
im·ma·ture
ˌim-ə-ˈt(y)u̇(ə)r
2
: showing less than an expected degree of maturity
immature behavior
immaturely
adverb
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