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
Commenting on Taiwan’s possible nuclear options, Jusen Asuka, a professor at Tohoku University and chair of the session in the conference, cautioned that SMRs remain immature and costly, and investing heavily in them could slow renewable energy development.
—
Yu-Tzu Chiu, IEEE Spectrum, 2 Oct. 2025
In some cases, these are labelled as muscular injuries but Monasterio warns players at these ages are still skeletally immature in these regions.
—Sarah Shephard, New York Times, 1 Oct. 2025
The closest anyone has come to success for eggs has been very primitive human egg cells that are too immature to be fertilized.
—Rob Stein, NPR, 30 Sep. 2025
The researchers produced 82 functional human oocytes, or immature egg cells, which then underwent fertilization in the lab.
—Katie Hunt, CNN Money, 30 Sep. 2025
See All Example Sentences for immature
Yu-Tzu Chiu, IEEE Spectrum, 2 Oct. 2025
In some cases, these are labelled as muscular injuries but Monasterio warns players at these ages are still skeletally immature in these regions.
—Sarah Shephard, New York Times, 1 Oct. 2025
The closest anyone has come to success for eggs has been very primitive human egg cells that are too immature to be fertilized.
—Rob Stein, NPR, 30 Sep. 2025
The researchers produced 82 functional human oocytes, or immature egg cells, which then underwent fertilization in the lab.
—Katie Hunt, CNN Money, 30 Sep. 2025
See All Example Sentences for immature
Recent Examples of Synonyms for immature
Adjective
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The group, mainly millennials and young Gen Xers, grew up in the internet era and recognize how technology can switch up the status quo.—
Emma Burleigh,
Fortune,
9 Nov. 2025
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Despite the absentees, Arteta had experienced players like Ben White, Piero Hincapie and Christian Norgaard to call upon, as well as exciting young talent like Myles Lewis-Skelly and Ethan Nwaneri.—
James McNicholas,
New York Times,
9 Nov. 2025
Adjective
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The brand is seeing an upswing post-pandemic, as these childish styles, long favored in Asia-Pacific countries like Japan and South Korea, become increasingly popular in China and the West.—
Lucy Maguire,
Vogue,
30 Oct. 2025
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She’s fallen under the sway of a fashionable worldview in which logic is paramount, and the realm of emotion and magic and even dæmons is just childish fancy.—
Lev Grossman,
The Atlantic,
23 Oct. 2025
Adjective
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Jokic didn’t overtake Jamal Murray as Denver’s leading scorer until their seventh game of the season, after a 33-point performance Wednesday against a Miami Heat frontcourt that was woefully undersized and inexperienced the instant Bam Adebayo exited with a foot injury.—
Bennett Durando,
Denver Post,
8 Nov. 2025
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Henderson has struggled in that role as a rookie, and Jennings is inexperienced at the pro level.—
Doug Kyed,
Boston Herald,
8 Nov. 2025
Adjective
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Conversely, the percentage of respondents who think juvenile offenders should be treated like adults has fallen from 65% in 2000 to a record-low 41% this year, the report said.—
Aspen Pflughoeft,
Miami Herald,
10 Nov. 2025
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All face charges of providing material support to a foreign terrorist organization, and additional juvenile cases may be under seal.—
Jasmine Baehr,
FOXNews.com,
9 Nov. 2025
Adjective
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No adolescent defiance or child’s anguish was visible on his face now.—
George Packer,
The Atlantic,
6 Nov. 2025
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Read more about the adolescent biology of sleep patterns.—
NPR,
NPR,
5 Nov. 2025
Cite this Entry
“Immature.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/immature. Accessed 18 Nov. 2025.
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