im·​ma·​ture ˌi-mə-ˈchu̇r How to pronounce immature (audio) -ˈtu̇r How to pronounce immature (audio)
: exhibiting less than an expected degree of maturity
emotionally immature adults
: lacking complete growth, differentiation, or development
immature fruits
a sexually immature bird
: having the potential capacity to attain a definitive form or state : crude, unfinished
a vigorous but immature school of art
archaic : premature
immature noun
immaturely adverb
ˌi-mə-ˈchu̇r-ə-tē How to pronounce immature (audio)

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 Liking and sharing posts that are offensive, insensitive and hurtful was immature and disrespectful which was never my intent. Greg Cote, Miami Herald, 4 Apr. 2024 Animals with weakened or immature immune systems, like the goat kids in this case, are at higher risk of contracting disease, the board said. Michael Dorgan, Fox News, 20 Mar. 2024 First-year males may show a combination of immature and adult plumage. Taylor Piephoff, Charlotte Observer, 31 Jan. 2024 Cal, like many newborns, had an immature liver, leading to jaundice. Karen Weintraub, USA TODAY, 17 Mar. 2024 Their game-changing discoveries will result in a massive cover story in a glitzy magazine, the many years of their Ph.D. research solving the mystery of colony collapse disorder — when worker bees exit a honey bee colony, leaving the queen with food and nurse bees to care for the immature bees. David John Chávez, The Mercury News, 13 Mar. 2024 See it Only one immature Andaman shortnose chimaera was found, and the male measured 20 inches in length, the study said. Aspen Pflughoeft, Miami Herald, 6 Mar. 2024 Many of the few eagles who reside here are tagged, but this one was not, and the tail was streaked with black, not yet pure white, suggesting an immature age of 4 to 5 years. Ernie Cowan, San Diego Union-Tribune, 18 Feb. 2024 Everyone is exhausted with the fear-mongering and immature social media bickering of most politicians these days. Eleanor Dearman, Fort Worth Star-Telegram, 15 Feb. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'immature.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


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

Dictionary Entries Near immature

Cite this Entry

“Immature.” Dictionary, Merriam-Webster, Accessed 21 Apr. 2024.

Kids Definition


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

Medical Definition


ˌim-ə-ˈt(y)u̇(ə)r also -ˈchu̇(ə)r
: lacking complete growth, differentiation, or development
immature blood cells
emotionally immature
immaturely adverb
-ˈt(y)u̇r-ət-ē also -ˈchu̇r-
plural immaturities

More from Merriam-Webster on immature

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