person below the legal age of majority or adulthood. The age of majority varies in different countries, and even in different jurisdictions within a country. It also differs with the type of activity concerned, such as marrying, purchasing alcohol, or driving an automobile. Twenty-one years is a common division between minors and adults.

The concept of minority rests on the assumption that children are incapable of self-management. A minor also has special protection against strangers and irresponsible parents. A minor in most countries can acquire property but cannot sell it; and his acquisitions are controlled by his parents, subject always to review by the courts for abuses.

Similarly, minors—even if they misrepresent their age—cannot be bound to contracts (contract) they sign; these are said to be voidable but not void. Thus, if a minor contracts to buy a car, he can cancel the contract before the actual exchange of the car for the money. The contract is said to be voidable at his discretion.

Minors are, however, liable for harm they cause others—e.g., injuries to another child. Formerly, minors who committed crimes (crime) were held liable as if they were adults. In the 20th century this practice changed. Although minors were still disciplined for crimes, the emphasis was increasingly placed on rehabilitation, not punishment (see juvenile court).