Adult definition is - fully developed and mature: grown-up. How to use adult in a sentence. Mar 06, · a person who is fully grown or developed or of age. a full-grown animal or plant. a person who has attained the age of maturity as specified by law.
1. grown-up, mature person, person of mature age, grown or grown-up person (man or woman) Children under 14 must be accompanied by an adult. Adult also means suitable for grown people and not children: It’s a kids ’ show, but they sneak in some adult humor. Adult movies, magazines, shows, and books include content that is intended for adults .
Adult A person who by virtue of attaining a certain age, generally eighteen, is regarded in the eyes of the law as being able to manage his or her own affairs. Biologically, an adult is a human or other organism that has reached sexual maturity. In human context, the term adult additionally has meanings associated with social and legal concepts.
Adult is defined as grown up or something intended for a mature audience or of a mature nature. Dictionary! Menu. The definition of an adult is a person who is fully grown or is 18 years of age or older, as specified by the law. A 20 year old person is an example of an adult. noun. 0. 0.