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

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In contrast to a non-adult or "minor", a legal adult is a person who has attained the age of majority and is therefore regarded as independent, self-sufficient, and responsible.

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 dinner every …

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.

Definition of adult noun in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Apr 26, 2026 · adult (third-person singular simple present adults, present participle adulting, simple past and past participle adulted) (intransitive, slang) To behave like an adult.

Adult definition: Containing or dealing in explicitly sexual material; pornographic.

Discover everything about the word "ADULT" in English: meanings, translations, synonyms, pronunciations, examples, and grammar insights - all in one comprehensive guide.