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adult

[uh-duhlt, ad-uhlt] /əˈdʌlt, ˈæd ʌlt/
adjective
1.
having attained full size and strength; grown up; mature:
an adult person, animal, or plant.
2.
of, pertaining to, or befitting adults.
3.
intended for adults; not suitable for children:
adult entertainment.
noun
4.
a person who is fully grown or developed or of age.
5.
a full-grown animal or plant.
6.
a person who has attained the age of maturity as specified by law.
Origin
1525-1535
1525-35; 1925-30 for def 3; < Latin adultus grown (past participle of adolēre to make grow), equivalent to ad- ad- + ul- (identical with base al- in aliment, ol- in prolific) + -tus past participle suffix
Related forms
adulthood, noun
adultlike, adjective
adultly, adverb
adultness, noun
nonadult, adjective, noun
quasi-adult, adjective
subadult, adjective, noun
subadultness, noun
unadult, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for sub-adult

adult

/ˈædʌlt; əˈdʌlt/
adjective
1.
having reached maturity; fully developed
2.
of or intended for mature people: adult education
3.
regarded as suitable only for adults, because of being pornographic: adult films and magazines
noun
4.
a person who has attained maturity; a grownup
5.
a mature fully grown animal or plant
6.
(law) a person who has attained the age of legal majority (18 years for most purposes) Compare infant
Derived Forms
adulthood, noun
Word Origin
C16: from Latin adultus, from adolēscere to grow up, from alēscere to grow, from alēre to feed, nourish
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
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Word Origin and History for sub-adult

adult

adj.

1530s (but not common until mid-17c.), from Latin adultus "grown up, mature, adult, ripe," past participle of adolescere "grow up, mature" (see adolescent). As a euphemism for "pornographic," it dates to 1958 and does no honor to the word.

n.

"adult person," 1650s, from adult (adj.).

Online Etymology Dictionary, © 2010 Douglas Harper
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sub-adult in Medicine

adult a·dult (ə-dŭlt', ād'ŭlt)
n.

  1. One who has attained maturity or legal age.

  2. A fully grown, mature organism.

adj.
Fully developed and mature.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Slang definitions & phrases for sub-adult

adult

adjective

Euphemistically meaning unsuitable for children: adult entertainment (1950s+)


The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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