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
These are all very mature, complete players at an age where many play immature, incomplete games.
—
Scott Wheeler, New York Times, 22 June 2025
Insecure endpoints, poor management and generally immature cybersecurity practices created an ecosystem ripe with exploitable gaps.
—Thomas Ryd, Forbes.com, 1 July 2025
Moment Makers Group All cycles involved fresh oocytes (immature eggs found in the ovaries) from young donors (average age 26.1), frozen sperm from male partners and a single blastocyst embryo transfer.
—Daniella Gray, MSNBC Newsweek, 29 June 2025
After hatching, the immature cicadas or nymphs spend 17 or 13 years underground, feeding on roots, then emerge during the spring and transform into adult cicadas.
—Saman Shafiq, USA Today, 22 June 2025
See All Example Sentences for immature
Scott Wheeler, New York Times, 22 June 2025
Insecure endpoints, poor management and generally immature cybersecurity practices created an ecosystem ripe with exploitable gaps.
—Thomas Ryd, Forbes.com, 1 July 2025
Moment Makers Group All cycles involved fresh oocytes (immature eggs found in the ovaries) from young donors (average age 26.1), frozen sperm from male partners and a single blastocyst embryo transfer.
—Daniella Gray, MSNBC Newsweek, 29 June 2025
After hatching, the immature cicadas or nymphs spend 17 or 13 years underground, feeding on roots, then emerge during the spring and transform into adult cicadas.
—Saman Shafiq, USA Today, 22 June 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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Note: Cal Raleigh’s dad was his pitcher, and his younger brother was his catcher in the Home Run Derby.—
Bernie Pleskoff,
Forbes.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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This also means Krypto the Superdog is decidedly juvenile, owing more in spirit to shows like A Pup Named Scooby-Doo than any Superman cartoon produced in the last 40 years.—
Daniel Dockery,
Vulture,
11 July 2025
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If a juvenile assaults someone while stealing a car, what should their punishment be?—
Mikenzie Frost,
Baltimore Sun,
10 July 2025
Adjective
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Whatever the answer, the most enjoyable parts of Friday’s concert offered more than just a chance for attendees to revisit their adolescent years in song by channeling anew feelings of young love, longing and fresh-faced angst.—
George Varga,
San Diego Union-Tribune,
13 July 2025
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Based on Masashi Kishimoto’s long-running manga series, Naruto follows a misunderstood adolescent ninja working to clear his name and polish his powers.—
Declan Gallagher,
EW.com,
12 July 2025
Cite this Entry
“Immature.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/immature. Accessed 21 Jul. 2025.
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