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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Example Sentences
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Recent Examples of immature
Pluripotent stem cells are, of course, immature stem cells that can develop into specific cells.
—
Bronwyn Thompson, New Atlas, 26 May 2025
There are three immature stages that are black and white, with the fourth stage being red, black and white before becoming adults later in the summer.
—Kaycee Sloan, The Enquirer, 14 July 2025
To be effective the spray has to cover the immature stages.
—Tom MacCubbin, The Orlando Sentinel, 5 July 2025
Tomatoes must reach their mature size before harvesting, as immature green tomatoes will never ripen.
—Kim Toscano, Southern Living, 5 July 2025
See All Example Sentences for immature
Bronwyn Thompson, New Atlas, 26 May 2025
There are three immature stages that are black and white, with the fourth stage being red, black and white before becoming adults later in the summer.
—Kaycee Sloan, The Enquirer, 14 July 2025
To be effective the spray has to cover the immature stages.
—Tom MacCubbin, The Orlando Sentinel, 5 July 2025
Tomatoes must reach their mature size before harvesting, as immature green tomatoes will never ripen.
—Kim Toscano, Southern Living, 5 July 2025
See All Example Sentences for immature
Recent Examples of Synonyms for immature
Adjective
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With school out for most young people, TV usage among kids 6 to 17 increased 27% compared with May, with streaming accounting for two-thirds of the group’s TV time.—
Dade Hayes,
Deadline,
15 July 2025
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Princess Mako, a niece of Japan's Emperor Naruhito (and whose younger brother is the likely next ruler of Japan), married her longtime love, Kei Komuro, in a simple ceremony at a registry office on Oct. 26, 2021.—
Alex Apatoff,
People.com,
15 July 2025
Adjective
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The exchange ended with both men accusing the other of acting childish.—
Kinsey Crowley,
USA Today,
26 June 2025
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Compiled from Candace Bushnell’s column of the same name from The New York Observer, the book is a dark and bizarre look at dating in 1990s New York, where men are pathologically childish, cruel, and self-centered, and women are domineering, striving, and manipulative.—
Alice Bolin
June 23,
Literary Hub,
23 June 2025
Adjective
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In fact, juvenile arrests for violent felonies — including many in and around transit — increased in both 2023 and 2024, but these offenses were largely excluded from public crime data.—
Marc Molinaro,
New York Daily News,
25 July 2025
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He is wanted for simple kidnapping, cruelty to a juvenile and false imprisonment, the sheriff’s office says.—
Mark Price
July 24,
Miami Herald,
24 July 2025
Adjective
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Globally, obesity in adults has more than doubled since 1990, with adolescent rates quadrupling, the World Health Organization reported.—
Sara Chernikoff,
USA Today,
23 July 2025
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Rates of obesity in adults have more than doubled globally since 1990, and adolescent rates have quadrupled, according to the World Health Organization.—
Kaitlin Sullivan,
NBC news,
21 July 2025
Cite this Entry
“Immature.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/immature. Accessed 30 Jul. 2025.
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