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
Too naive, too immature to understand.
—
Hua Hsu, New Yorker, 20 Apr. 2026
The landscaping was sparse and immature.
—Literary Hub, 14 Apr. 2026
The two did a nice job portraying teenagers who go back and forth from sincere to ridiculously immature, but the best part was their horror when Jost fired back.
—Omar L. Gallaga, Los Angeles Times, 12 Apr. 2026
Simandl was then rushed to Tampa General Hospital for urgent treatment and was diagnosed with acute promyelocytic leukemia (APL) — a rare and aggressive form of leukemia where immature white blood cells multiply uncontrollably, preventing the body from producing healthy blood cells.
—Tereza Shkurtaj, PEOPLE, 11 Apr. 2026
See All Example Sentences for immature
Hua Hsu, New Yorker, 20 Apr. 2026
The landscaping was sparse and immature.
—Literary Hub, 14 Apr. 2026
The two did a nice job portraying teenagers who go back and forth from sincere to ridiculously immature, but the best part was their horror when Jost fired back.
—Omar L. Gallaga, Los Angeles Times, 12 Apr. 2026
Simandl was then rushed to Tampa General Hospital for urgent treatment and was diagnosed with acute promyelocytic leukemia (APL) — a rare and aggressive form of leukemia where immature white blood cells multiply uncontrollably, preventing the body from producing healthy blood cells.
—Tereza Shkurtaj, PEOPLE, 11 Apr. 2026
See All Example Sentences for immature
Recent Examples of Synonyms for immature
Adjective
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The Modernist is friendly, drawing a mostly millennial mix of young families, gay couples, and girls trips.—
Condé Nast,
Condé Nast Traveler,
14 May 2026
-
In all, through injuries and midweek rest for veterans, Varas started five players who are 20 or younger.—
Mark Zeigler,
San Diego Union-Tribune,
14 May 2026
Adjective
-
Gombrowicz never really ‘assimilated’ to life in Argentina, partly due to the unique and unprecedented circumstances that brought him there in the first place, but also because of his naturally irreverent and at times even childish attitude towards literary establishment.—
Literary Hub,
Literary Hub,
11 May 2026
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The literature on adolescence marks middle school as a turning point, a time when kids begin to pull away from their parents, discard childish pursuits, and pursue, full thrust, the exhausting project of individuation.—
Anna Wiener,
New Yorker,
4 May 2026
Adjective
-
Another risk is infection from non-sterile equipment, which might happen if the procedure is done by inexperienced technicians or in non-medical settings, Hazan says.—
Erica Sweeney,
Time,
11 May 2026
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The other strong selling point is that the inexperienced videographer doesn't have to fiddle with a load of settings before recording.—
David Szondy
May 09,
New Atlas,
9 May 2026
Adjective
-
The juvenile bear’s wander across campus late Thursday and early Friday prompted an advisory to students and a search by UC Davis police and wardens from the California Department of Fish and Wildlife as well as Yolo County Animal Control.—
Allison Gibson,
Sacbee.com,
15 May 2026
-
Over the last 20 years, scientists have documented an increasing number of juvenile great white sharks cruising waters off Southern California beaches.—
Ian James,
Los Angeles Times,
14 May 2026
Adjective
-
What supports adolescent contribution?—
Jen Agans,
The Conversation,
8 May 2026
-
For any adolescent, a private bedroom is both sanctuary and mood board.—
Anna Wiener,
New Yorker,
4 May 2026
Cite this Entry
“Immature.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/immature. Accessed 18 May. 2026.
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