A master, a ‘governor’. Obsolete exc. dialect.

colloquial. A person in authority over others. A master, overseer, or foreman; a senior official; a person in charge.

colloquial and slang (chiefly British). A person (originally and chiefly a man) occupying a position of authority or seniority; spec. (a) a…

A woman in charge of a household, department, institution, etc.; the most important woman in a group, business, or organization.

An originally American equivalent of ‘master’ in the sense of employer of labour; applied also to a business manager, or any one who has a right…

In Japan: a master, a boss; (Sumo) the master of a wrestling stable. Also as a form of address.

A man in a position of authority or seniority; esp. a person's immediate superior; a boss. Also as a form of address. Cf. governor, n. 7.

A worker who manages or is in charge of other workers. In later use chiefly U.S.: (the title or position of) a person who manages a settlement…

= boss, n.6

= guv'nor, n. 1.

The person in charge; the boss.

Chiefly with the. A boss or leader; a powerful, wealthy, or prominent person. Frequently in figurative context, denoting such people as a class.

The director or captain of a curling or bowling team or side. Also gen., a captain, a commanding officer, a manager, a boss.

U.S. slang. (A nickname for) a powerful leader, chief, or boss.

= a.

slang. = boss, n.6

Originally and chiefly U.S. Originally: the leader of a small group or squad. Hence: any person in charge; a manager, a boss.

With modifying word, esp. in head honcho.