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
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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As adult influencers dominate online fashion culture, and tweens and teens see the same content as adults, there are fewer spaces for young people to develop styles of their own.
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While veterans jockey for new contracts during free agency, young players are getting their tryout opportunities with NBA summer league games beginning this week.
Adjective
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Of course, this is no tragedy — there comes a time to put away childish things, 40-something video-gamers notwithstanding — but the movie comes close to regarding it as such.
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This one has a charming clover shape to make your space feel animated, but not 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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In 2023, 18-year-old Bryan Diaz died of a fentanyl overdose at the county’s other main juvenile hall in Sylmar.
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Others questioned how the county is addressing juvenile crime, including carjackings involving young suspects.
Adjective
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Programming includes individual and family mental wellness counseling, lifestyle empowerment consultations, and adolescent nutritional consultations.
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At another section of the hospital, teens in hospital scrubs walked the quiet halls of the adolescent unit with their lunch trays.
Cite this Entry
“Immature.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/immature. Accessed 2 Jul. 2026.
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