immature

[ im-uh-choor, -toor, -tyoor, -chur ]
/ ˈɪm əˈtʃʊər, -ˈtʊər, -ˈtyʊər, -ˈtʃɜr /

adjective

not mature, ripe, developed, perfected, etc.
emotionally undeveloped; juvenile; childish.
Physical Geography. youthful (def. 5).
Archaic. premature.

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Origin of immature

First recorded in 1540–50, immature is from the Latin word immātūrus unripe, hence, untimely. See im-2, mature

OTHER WORDS FROM immature

im·ma·ture·ly, adverbim·ma·ture·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for immature

British Dictionary definitions for immature

immature
/ (ˌɪməˈtjʊə, -ˈtʃʊə) /

adjective

not fully grown or developed
deficient in maturity; lacking wisdom, insight, emotional stability, etc
geography a less common term for youthful (def. 4)

Derived forms of immature

immaturity or immatureness, nounimmaturely, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for immature

immature
[ ĭm′ə-chur, -tur ]

adj.

Not fully grown or developed.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.