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
When first released, Marfenin’s hydrozoan medusae are immature.
—
Aspen Pflughoeft, Miami Herald, 28 Aug. 2025
The immature or nymph stage is similar in shape but more red than adult bugs.
—Arricca Elin Sansone, Southern Living, 23 Aug. 2025
Unlike adults who have usually acquired some ability to regulate their nervous system states, a child has both an immature nervous system and an underdeveloped prefrontal cortex.
—Nancy L. Weaver, The Conversation, 21 Aug. 2025
Levy also noted, however, that the complaints about Muckey’s behavior related to his early years with the Philharmonic, when multiple members of the orchestra described him as immature and irresponsible.
—Sammy Sussman, Vulture, 8 Aug. 2025
See All Example Sentences for immature
Aspen Pflughoeft, Miami Herald, 28 Aug. 2025
The immature or nymph stage is similar in shape but more red than adult bugs.
—Arricca Elin Sansone, Southern Living, 23 Aug. 2025
Unlike adults who have usually acquired some ability to regulate their nervous system states, a child has both an immature nervous system and an underdeveloped prefrontal cortex.
—Nancy L. Weaver, The Conversation, 21 Aug. 2025
Levy also noted, however, that the complaints about Muckey’s behavior related to his early years with the Philharmonic, when multiple members of the orchestra described him as immature and irresponsible.
—Sammy Sussman, Vulture, 8 Aug. 2025
See All Example Sentences for immature
Recent Examples of Synonyms for immature
Adjective
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The Kirks have two young children.—
Joey Garrison,
USA Today,
14 Sep. 2025
-
Here’s what each royal inherited from Queen Elizabeth So, the King’s decision to meet with his youngest son doesn’t just put him in direct opposition to Prince William, but also one of his closest advisors.—
Lizzie Lanuza,
StyleCaster,
13 Sep. 2025
Adjective
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For decades, bartenders have been defaming the Mai Tai, debasing it, making and selling versions of the drink that were childish and incomplex, saccharine and flat.—
Jason O'Bryan,
Robb Report,
13 Sep. 2025
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Although childish and superficial, his renaming the Department of Defense as the Department of War doesn’t telegraph a love of peace.—
Steven Greenhut,
Oc Register,
12 Sep. 2025
Adjective
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Clearly frustrated, Palencia gave up five runs and recorded zero outs during the ninth inning of that 6-3 loss to the Washington Nationals, a last-place team with a largely inexperienced and nondescript lineup.—
Patrick Mooney,
New York Times,
13 Sep. 2025
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Having won five straight Ryder Cups and 12 of the last 13, the American team entered as the heavy favorite despite fielding a relatively inexperienced squad.—
Tim Corlett,
Forbes.com,
11 Sep. 2025
Adjective
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As the consequences of permanent records became clear—blocking access to jobs, housing, and education—states began experimenting with mechanisms to seal or expunge certain convictions, usually for first-time or juvenile offenders.—
Walter Pavlo,
Forbes.com,
15 Sep. 2025
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Unlike natural thinning, large fire-resilient trees are typically high-graded for felling in Jackson, creating tinderboxes of 300 to 500 mostly juvenile trees per acre.—
John P. O’Brien,
Mercury News,
13 Sep. 2025
Adjective
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But in recent years, psychologists, sociologists and concerned parents alike have noticed a growing number of young adults who seem caught in this adolescent quicksand — unable or unwilling to take the next step into adulthood.—
Mark Travers,
Forbes.com,
13 Sep. 2025
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Advertisement Advertisement Boston Children’s Hospital was home to the first pediatric and adolescent transgender health program in the nation, according to court documents.—
Solcyré Burga,
Time,
10 Sep. 2025
Cite this Entry
“Immature.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/immature. Accessed 19 Sep. 2025.
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