Adult

The term adult describes any mature organism, but normally it refers to a human: one that is no longer a child / minor and is now either a man or a woman. Adulthood can be defined in terms of biology, law, personal character, or social status. These different aspects of adulthood are often inconsistent and contradictory. A person may be biologically an adult, and have adult behavioral characteristics but still be treated as a child if they are under the legal age of majority. Conversely one may legally be an adult but possess none of the maturity and responsibility that define adult character..

"Adult" also means "not considered suitable for children", in particular as a euphemism for being related to sexual behaviour, such as adult entertainment, adult video, adult magazine, adult bookstore. However, adult education simply means education for adults, not particularly sex education.

Biological Adulthood

Adulthood is generally understood as the time when physical maturation is complete. One reaches their maximum height and secondary sex characteristics form such as Body hair and facial hair, Voice lowers in pitch (especially noticeable in men), and Menses begin (women). Natural sleep patterns change in adulthood, as adults typically require less sleep than during adolescence. One thing people don't specify is what (Psychologically) an adult is. A common theory is that adulthood is the real test of life, to experience the world from a first-person standpoint instead of through the parents. Then the adult can pass those experiences down to younger people and they can experience them when they grow up.