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
Swit’s Houlihan was a tough-as-nails nurse who did things by the book and disapproved of the immature antics displayed by the likes of Alan Alda’s Hawkeye.
—
Dave Nemetz, TVLine, 30 May 2025
But the researchers note that adult howlers are nearly three times the weight of immature capuchins, so a would-be kidnapper might face serious risks.
—Nell Greenfieldboyce, NPR, 19 May 2025
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
See All Example Sentences for immature
Dave Nemetz, TVLine, 30 May 2025
But the researchers note that adult howlers are nearly three times the weight of immature capuchins, so a would-be kidnapper might face serious risks.
—Nell Greenfieldboyce, NPR, 19 May 2025
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
See All Example Sentences for immature
Recent Examples of Synonyms for immature
Adjective
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The core group of young professionals, both men and women aged 25-35, is joined by the next gen category of those age 18-24, now about a quarter of the business.—
Tim Newcomb,
Forbes.com,
2 July 2025
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Los Angeles is getting a young piece that could improve quite a bit over the next two years.—
Evan Massey,
MSNBC Newsweek,
1 July 2025
Adjective
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His comment about Shildt mad dogging him was childish and hilarious.—
Dennis Lin,
New York Times,
21 June 2025
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But their tit for tat antics on social media have come across as particularly childish given their immense wealth and responsibilities.—
Colin Pascal,
Baltimore Sun,
9 June 2025
Adjective
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Chief among these concerns are the misguided beliefs by some supporting the passage of legislation aimed at ensuring juvenile crimes start in the juvenile system, including heinous acts such as murder and rape.—
Ivan J. Bates,
Baltimore Sun,
30 June 2025
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Sharks don’t seek out humans and most incidents are cases of mistaken identity – including by juvenile sharks that fail to distinguish between humans and their prey, shark researchers have told CNN.—
Danya Gainor,
CNN Money,
28 June 2025
Adjective
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Injury and burnout were adult problems, far from my adolescent horizon.—
Ellen O'Connell Whittet
June 25,
Literary Hub,
25 June 2025
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Katie Hurley, a child and adolescent psychotherapist and senior clinical advisor for The Jed Foundation, encourages parents to read the labels of any supplements or protein powders their sons are currently using or interested in trying.—
Ashleigh N. DeLuca,
Parents,
24 June 2025
Cite this Entry
“Immature.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/immature. Accessed 7 Jul. 2025.
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