1
as in young
being in the early stage of life, growth, or development
immature frogs are called "tadpoles"
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Antonyms & Near Antonyms
2
as in childish
having or showing the annoying qualities (as silliness) associated with children
an immature teenager who still threw tantrums
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Antonyms & Near Antonyms
3
as in inexperienced
lacking in adult experience or maturity
many high school students are still too immature to foresee the consequences of their actions
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Example Sentences
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Recent Examples of immature
When the eggs hatch, the immature stages start feeding.
—
Arricca Elin Sansone, Southern Living, 5 Aug. 2025
Why is the administration favoring advanced nuclear and next-gen geothermal which are commercially immature compared with wind and solar?
—Ian Dexter Palmer, Forbes.com, 4 Aug. 2025
That’s the idea of being mature or immature, right?
—Jason Jones, New York Times, 1 Aug. 2025
At the very worst, an immature 18-year-old makes a horrific decision on a whim to deface his or her torso with a tableau of repulsive images that could potentially cause medical complications later in life.
—Scott Liftman, Boston Herald, 25 July 2025
See All Example Sentences for immature
Arricca Elin Sansone, Southern Living, 5 Aug. 2025
Why is the administration favoring advanced nuclear and next-gen geothermal which are commercially immature compared with wind and solar?
—Ian Dexter Palmer, Forbes.com, 4 Aug. 2025
That’s the idea of being mature or immature, right?
—Jason Jones, New York Times, 1 Aug. 2025
At the very worst, an immature 18-year-old makes a horrific decision on a whim to deface his or her torso with a tableau of repulsive images that could potentially cause medical complications later in life.
—Scott Liftman, Boston Herald, 25 July 2025
See All Example Sentences for immature
Recent Examples of Synonyms for immature
Adjective
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Specifically, the complaint alleges that young TikTok users, those ages 13 to 17, may isolate themselves from their peers while on the app, or compare themselves too much to others, which may lead to self-confidence issues.—
Greta Cross,
USA Today,
22 Aug. 2025
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Being able to stay calm in certain scenarios is a valuable lesson learned at a very young age.—
Dom Amore,
Hartford Courant,
21 Aug. 2025
Adjective
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There are childish elements – cartoony comic-relief kids, a cute ball-robot called Haro who’d become Gundam’s enduring mascot.—
Kambole Campbell,
IndieWire,
21 Aug. 2025
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Somewhere between building sandcastles as children and assuming adult responsibilities, the impulse to play is often labeled as childish.—
Cheryl Robinson,
Forbes.com,
19 Aug. 2025
Adjective
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The two worked together before entering city government on projects surrounding the juvenile justice system and youth incarceration.—
Drake Bentley,
jsonline.com,
19 Aug. 2025
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The arrest of a 13-year-old boy in connection with a series of armed carjackings and robberies across Baltimore has sparked a debate on juvenile crime and the effectiveness of the Department of Juvenile Services.—
Keith Daniels,
Baltimore Sun,
16 Aug. 2025
Adjective
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His adolescent daughter Louise was standing beneath a big top in a rural French town preparing to enter the center ring.—
April White,
JSTOR Daily,
18 Aug. 2025
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Boys Go to Jupiter captures an adolescent malaise without talking down to its teens — there is no preaching about real jobs, responsibilities, or five-year plans.—
Fran Hoepfner,
Vulture,
14 Aug. 2025
Cite this Entry
“Immature.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/immature. Accessed 31 Aug. 2025.
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