- having attained full size and strength; grown up; mature: an adult person, animal, or plant.
- of, relating to, or befitting adults.
- intended for adults; not suitable for children: adult entertainment.
- a person who is fully grown or developed or of age.
- a full-grown animal or plant.
- a person who has attained the age of maturity as specified by law.
Origin of adult
- having reached maturity; fully developed
- of or intended for mature peopleadult education
- regarded as suitable only for adults, because of being pornographicadult films and magazines
- a person who has attained maturity; a grownup
- a mature fully grown animal or plant
- law a person who has attained the age of legal majority (18 years for most purposes)Compare infant
Word Origin for adult
Word Origin and History for unadult
"adult person," 1650s, from 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.
- One who has attained maturity or legal age.
- A fully grown, mature organism.
- Fully developed and mature.