immature [ im- uh- ch, - oo r t, - oo r ty, - oo r chur] Synonyms Word Origin See more synonyms on Thesaurus.com not mature, ripe, developed, perfected, etc. emotionally undeveloped; juvenile; childish. . Physical Geography youthful. (def 5) . Archaic premature. Origin of immature
First recorded in
is from the
unripe, hence, untimely. See
mature Related forms im·ma·ture·ly, adverb im·ma·ture·ness, noun
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for immatureness 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 immaturity or immatureness, noun immaturely, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for immatureness immature adj.
1540s, "untimely, premature," from Latin
immaturus "untimely, unripe," from assimilated form of in- "not, opposite of" (see in- (1)) + maturus (see mature (v.)). In 16c., usually in reference to early death; modern sense of "not fully developed" first recorded 1640s. In reference to mentalities or behaviors not considered age-appropriate, from 1920.
Online Etymology Dictionary, © 2010 Douglas Harper
immature (ĭm′ə-chur ′, -tur ′) Not fully grown or developed.
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