The meaning of ADULT is fully developed and mature : grown-up. How to use adult in a sentence.

The biological definition of adult is an organism that has reached sexual maturity and thus capable of reproduction. In the human context, the term adult has meanings associated with legal and …

Adult definition: a person who is fully grown or developed or of age.. See examples of ADULT used in a sentence.

An adult under English law is someone over 18 years old. Adults pay an admission charge but children get in free.

Adult is noun and an adjective, both of which refer to something mature, no longer a child. A full-grown person is called an adult: they can vote, rent cars, and choose to eat sugary cereal for …

1. Fully developed and mature. 2. Relating to, intended for, or befitting adults: adult education. 3. Containing or dealing in explicitly sexual material; pornographic: adult movies.

(intransitive) informal to live or behave like an adult, esp by being responsible and independent Etymology: 16th Century: from Latin adultus, from adolēscere to grow up, from alēscere to …

If you say that someone is adult about something, you think that they act in a mature, intelligent way, especially when faced with a difficult situation.

An adult is a biologically mature individual who has reached the age of majority, typically characterized by physical and cognitive development, as well as assumed legal rights and …

Oct 7, 2025 · Stay up-to-date on recommended vaccines. View and print CDC immunization schedules for adults.