1
as in young
being in the early stage of life, growth, or development
immature frogs are called "tadpoles"
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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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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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Examples of immature in a Sentence
Recent Examples on the Web
Buckner applies a larvicide, an insecticide that kills immature mosquitoes or larvae, that contains the naturally occurring Bacillus thuringiensis subspecies israelensis (Bti) to a water fountain in her yard every month.
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Korin Miller, Outside Online, 30 Aug. 2024
Researchers have found that rapamycin prevents activation of primordial follicles — or immature egg reserves — in lab mice, prolonging ovarian function.
—Celia Ford, Vox, 12 Aug. 2024
The new book is about what is happening to society, right now, as a very immature form of AI (generative AI) is spreading rapidly.
—Kate Irwin, PCMAG, 17 Sep. 2024
Lily in the book is young (her early 20s) and an often irritatingly immature character, but her eyes are at least open to what’s happening in her relationship.
—Katie Walsh, Los Angeles Times, 9 Aug. 2024
See all Example Sentences for immature 
Korin Miller, Outside Online, 30 Aug. 2024
Researchers have found that rapamycin prevents activation of primordial follicles — or immature egg reserves — in lab mice, prolonging ovarian function.
—Celia Ford, Vox, 12 Aug. 2024
The new book is about what is happening to society, right now, as a very immature form of AI (generative AI) is spreading rapidly.
—Kate Irwin, PCMAG, 17 Sep. 2024
Lily in the book is young (her early 20s) and an often irritatingly immature character, but her eyes are at least open to what’s happening in her relationship.
—Katie Walsh, Los Angeles Times, 9 Aug. 2024
See all Example Sentences for immature
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'immature.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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Cite this Entry
“Immature.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/immature. Accessed 1 Oct. 2024.
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