adult (ˈædʌlt, əˈdʌlt) — adj 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 — n 4. a person who has attained maturity; a grownup 5. a mature fully grown animal or plant 6. law Compare infant a person who has attained the age of legal majority (18 years for most purposes) [C16: from Latin adultus, from adolēscere to grow up, from alēscere to grow, from alēre to feed, nourish] 'adulthood
a·dult [uh-duhlt, ad-uhlt] –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:
1525–35; 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 a·dult·hood, noun a·dult·like, adjective a·dult·ly, adverb a·dult·ness, noun non·a·dult, adjective, noun qua·si-a·dult, adjective sub·a·dult, adjective, noun sub·a·dult·ness, noun un·a·dult, adjective
Does being 19 make them adults???