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 social …

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

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

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.

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 dinner every …

Jan 18, 2025 · Explore the definition of the word "adult," as well as its versatile usage, synonyms, examples, etymology, and more.

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.

Nov 12, 2025 · adult (third-person singular simple present adults, present participle adulting, simple past and past participle adulted) (intransitive, slang) To behave like an adult.