1
as in young
being in the early stage of life, growth, or development
immature frogs are called "tadpoles"
Synonyms & Similar Words
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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
-
His mom likes another young lady for her son, not my daughter.—
R. Eric Thomas,
Chicago Tribune,
30 Apr. 2026
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This particular adaptation bookends the story with the character Alba (played in young adulthood by Rocío Hernández), the granddaughter of the clairvoyant matriarch Clara del Valle (played in older age by Dolores Fonzi) and the conservative, volatile patriarch Esteban Trueba (Alfonso Herrera).—
Laura Zornosa,
Los Angeles Times,
29 Apr. 2026
Adjective
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That’s as childish an expression as the show ever shares.—
Alison Herman,
Variety,
13 Apr. 2026
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The use of childish internet and video-game memes to describe violence is coarse and unworthy of the men and women who go in harm’s way.—
Eliot A. Cohen,
The Atlantic,
1 Apr. 2026
Adjective
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Maybe the bright lights of a win-or-go-home playoff game proved too big of a moment for a young, inexperienced Hawks team.—
Kristian Winfield,
New York Daily News,
1 May 2026
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Edmonton showed off its postseason poise in Game 5, throttling the Ducks in a 4-1 victory and putting the onus on their inexperienced opponents to finish off the series.—
Greg Beacham,
Los Angeles Times,
1 May 2026
Adjective
-
The boat had 13 people on board, including seven men, five women and a juvenile female.—
Robert McGreevy,
FOXNews.com,
25 Apr. 2026
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But in the weeks ahead, juvenile nymphs will become more common.—
ABC News,
ABC News,
25 Apr. 2026
Adjective
-
Even Michael’s social life is left blank, far beyond his adolescent solitudes.—
Richard Brody,
New Yorker,
23 Apr. 2026
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Relatedly, another study published Friday in JAMA Network Open found that rates of adolescent cannabis use increased after recreational use was legalized in California, but decreased after the Covid pandemic.—
Theresa Gaffney,
STAT,
20 Apr. 2026
Cite this Entry
“Immature.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/immature. Accessed 3 May. 2026.
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