- 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.
- 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.
- (of a young person) to do things and assume responsibilities that are associated with being an adult; act like an adult (usually used facetiously about minor accomplishments): I cook dinner for myself most nights—guess that means I'm adulting.
- having reached maturity; fully developed
- of or intended for mature people
- regarded as suitable only for adults, because of being pornographic
- a person who has attained maturity; a grownup
- a mature fully grown animal or plant
- a person who has attained the age of legal majority (18 years for most purposes)
