Immature Definition

ĭmə-tyo͝or, -cho͝or, -to͝or
adjective
Not mature or ripe; not completely grown or developed.
Webster's New World
Marked by or suggesting a lack of normal maturity.
Silly, immature behavior.
American Heritage Medicine
Not finished or perfected; incomplete.
Webster's New World
Lacking the emotional maturity, sense of responsibility, etc. characteristic of an adult, or of others one's own age.
Webster's New World
Worn down only slightly by erosion, as a land surface having steeply entrenched stream valleys that lack well-developed flood plains.
Webster's New World
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noun
An immature animal; a juvenile.
American Heritage Medicine

Origin of Immature

  • Latin immātūrus in- not in–1 mātūrus mature mā-1 in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Middle French immature

    From Wiktionary

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