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
Synonyms & Similar Words
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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Antonyms & Near Antonyms
Example Sentences
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Recent Examples of immature
The two did a nice job portraying teenagers who go back and forth from sincere to ridiculously immature, but the best part was their horror when Jost fired back.
—
Omar L. Gallaga, Los Angeles Times, 12 Apr. 2026
Simandl was then rushed to Tampa General Hospital for urgent treatment and was diagnosed with acute promyelocytic leukemia (APL) — a rare and aggressive form of leukemia where immature white blood cells multiply uncontrollably, preventing the body from producing healthy blood cells.
—Tereza Shkurtaj, PEOPLE, 11 Apr. 2026
When a tight’s game’s final third arrived, the Pirates resembled an immature team.
—Tom Krasovic, San Diego Union-Tribune, 9 Apr. 2026
Among other things, his fouling out in Game 3 of the 2024 Finals against the Celtics series in a semi-intentional fit of frustration was wildly immature for a great player in his sixth season.
—Tim Cowlishaw, Dallas Morning News, 5 Apr. 2026
See All Example Sentences for immature
Omar L. Gallaga, Los Angeles Times, 12 Apr. 2026
Simandl was then rushed to Tampa General Hospital for urgent treatment and was diagnosed with acute promyelocytic leukemia (APL) — a rare and aggressive form of leukemia where immature white blood cells multiply uncontrollably, preventing the body from producing healthy blood cells.
—Tereza Shkurtaj, PEOPLE, 11 Apr. 2026
When a tight’s game’s final third arrived, the Pirates resembled an immature team.
—Tom Krasovic, San Diego Union-Tribune, 9 Apr. 2026
Among other things, his fouling out in Game 3 of the 2024 Finals against the Celtics series in a semi-intentional fit of frustration was wildly immature for a great player in his sixth season.
—Tim Cowlishaw, Dallas Morning News, 5 Apr. 2026
See All Example Sentences for immature
Recent Examples of Synonyms for immature
Adjective
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The Modernist is friendly, drawing a mostly millennial mix of young families, gay couples, and girls trips.—
Condé Nast,
Condé Nast Traveler,
14 May 2026
-
In all, through injuries and midweek rest for veterans, Varas started five players who are 20 or younger.—
Mark Zeigler,
San Diego Union-Tribune,
14 May 2026
Adjective
-
Gombrowicz never really ‘assimilated’ to life in Argentina, partly due to the unique and unprecedented circumstances that brought him there in the first place, but also because of his naturally irreverent and at times even childish attitude towards literary establishment.—
Literary Hub,
Literary Hub,
11 May 2026
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The literature on adolescence marks middle school as a turning point, a time when kids begin to pull away from their parents, discard childish pursuits, and pursue, full thrust, the exhausting project of individuation.—
Anna Wiener,
New Yorker,
4 May 2026
Adjective
-
Raman, who had endorsed Bass’ reelection before throwing her hat in at the last minute, came off as inexperienced, touchy and unprepared.—
Gustavo Arellano,
Los Angeles Times,
7 May 2026
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They were throttled from start to finish, giving a young and inexperienced Spurs team plenty of confidence that Monday’s loss was nothing more than a fluke.—
Jon Krawczynski,
New York Times,
7 May 2026
Adjective
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In general, juvenile crimes are more often committed with others, and images of roaming throngs of teens has an outsized presence in media and in the public’s amygdala.—
Eric Levenson,
CNN Money,
9 May 2026
-
When officers arrived at the scene, a juvenile boy was being loaded into an ambulance.—
Chelsea Hylton,
CBS News,
8 May 2026
Adjective
-
What supports adolescent contribution?—
Jen Agans,
The Conversation,
8 May 2026
-
For any adolescent, a private bedroom is both sanctuary and mood board.—
Anna Wiener,
New Yorker,
4 May 2026
Cite this Entry
“Immature.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/immature. Accessed 15 May. 2026.
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