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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Antonyms & Near Antonyms
Example Sentences
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Recent Examples of immature
The products are predominantly used on newborns, infants and young children who are vulnerable to infection due to their immature immune systems, the federal agency said.
—
Nick Lentz, CBS News, 6 June 2026
The product was recalled in part due to the bacteria's higher threat to young children with immature immune systems that are more susceptible to infection.
—Madison E. Goldberg, PEOPLE, 6 June 2026
On a blind date, his descriptions of magical griffins and burning deserts sound humiliatingly immature.
—Amy Nicholson, Los Angeles Times, 3 June 2026
Beckham is charismatic and generally more thoughtful than the perception created by the impulsive or immature decisions that create headlines.
—Dan Duggan, New York Times, 2 June 2026
See All Example Sentences for immature
Nick Lentz, CBS News, 6 June 2026
The product was recalled in part due to the bacteria's higher threat to young children with immature immune systems that are more susceptible to infection.
—Madison E. Goldberg, PEOPLE, 6 June 2026
On a blind date, his descriptions of magical griffins and burning deserts sound humiliatingly immature.
—Amy Nicholson, Los Angeles Times, 3 June 2026
Beckham is charismatic and generally more thoughtful than the perception created by the impulsive or immature decisions that create headlines.
—Dan Duggan, New York Times, 2 June 2026
See All Example Sentences for immature
Recent Examples of Synonyms for immature
Adjective
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Moderate exercise has been shown to improve learning among students from elementary school through young adulthood, and the effects on attention, memory and executive function are well-documented, pediatricians say.—
Cierra Morgan,
Los Angeles Times,
18 June 2026
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Star pitcher Logan Webb and several of the team's young major leaguers, however, are not expected to be put on the block.—
Ian Miller OutKick,
FOXNews.com,
18 June 2026
Adjective
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This one has a charming clover shape to make your space feel animated, but not childish.—
Julia Harrison,
Architectural Digest,
12 June 2026
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The result feels comforting without skewing childish.—
Lauren Jarvis-Gibson,
Sacbee.com,
12 June 2026
Adjective
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At $18 or even $15 per hour, many companies don’t see value in hiring inexperienced teens who require extensive training to interact with customers, let alone achieve some measure of productivity.—
Ryan Craig,
Forbes.com,
19 June 2026
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Lagway’s depature after 19 starts leaves the Gators to choose between two talented, yet inexperienced options with just one combined start — by Philo against Gardner-Webb in 2025.—
Edgar Thompson,
The Orlando Sentinel,
18 June 2026
Adjective
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He was charged with felony disorderly conduct and detained for eight days at a juvenile facility in Kane County.—
Rebecca Johnson,
Chicago Tribune,
13 June 2026
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Police said the driver, a juvenile male, was found shot and died at the scene.—
Brandon Downs,
CBS News,
13 June 2026
Adjective
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Witt has known the coach since his adolescent years.—
Jaylon Thompson,
Kansas City Star,
13 June 2026
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Upward of a hundred promising adolescent boys, scouted as young as six, are admitted each year to live and train at the facility full time, in a system that resembles top youth-development programs in Europe and South America.—
Dan Greene,
New Yorker,
12 June 2026
Cite this Entry
“Immature.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/immature. Accessed 20 Jun. 2026.
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