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
Infant botulism is a rare but serious illness that occurs in babies under age 1, whose gut microbiomes are immature.
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ABC News,
13 June 2026
Edamame is young, immature soybeans.
—
Carrie Madormo,
Verywell Health,
8 June 2026
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.
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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
See All Example Sentences for immature
ABC News,
13 June 2026
Edamame is young, immature soybeans.
—
Carrie Madormo,
Verywell Health,
8 June 2026
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
See All Example Sentences for immature
Recent Examples of Synonyms for immature
Adjective
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Still, younger investors are leading the charge for AI adoption.
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Most of those children are 3 years old and younger, USA TODAY has reported.
Adjective
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This one has a charming clover shape to make your space feel animated, but not childish.
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The result feels comforting without skewing childish.
Adjective
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The subtext beneath that statement is that Syd recognizes why Tina might be loath to take orders from a boss who is younger and, relative to Carmy, inexperienced in the business.
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Army investigations have repeatedly pointed to the same factors contributing to fatal training incidents including sleep deprivation, inadequate training and inexperienced leaders supervising high-risk exercises.
Adjective
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The Union County Prosecutors Office announced that 18-year-old Vincent Battiloro of Garwood has been waived up to adult court and will be tried as an adult in connection with the murder of the two juvenile females.
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Councilman Jeremy Rivas, D-2nd, asked about the main cause of juvenile detention in Porter County and JDAI Coordinator Chante Harden said drug possession and battery stemming from family conflicts were the main causes.
Adjective
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That requires separating social media use from adolescent distress, loneliness, family instability, sleep disruption, bullying, genetics, psychiatric vulnerability, pandemic effects, and reverse causation.
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This unceasing pressure to build a perfect résumé seeps into every dimension of adolescent life, transforming activities that should be sources of joy and discovery into instrumental checkboxes.
Cite this Entry
“Immature.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/immature. Accessed 29 Jun. 2026.
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