ADULT

[noun] [C], [adjective] - (a person or animal that is) grown to full size and strengthan adult male/elephant/sparrowShe spent most of her adult life in prison. [C]An adult under British law is someone over 18 years old.Adults pay an admission charge but children get in free.His behaviour/sense of humour is not very adult (= it is childish, not suitable for his age). [C]Let's try to be adult about this (= we should behave or talk reasonably, like fully grown people).Adult films, magazines and books are ones intended for sexual entertainment, and show naked people and describe sexual activity.Adult education refers to classes, usually during the evening, for people who have finished their school education.