| 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. |
| 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. |
adult a·dult (ə-dŭlt', ād'ŭlt)
n.
One who has attained maturity or legal age.
A fully grown, mature organism.