n. A man who has authority; a man who exercises the chief control over something or some one; a paramount ruler, governor, or director.n. Specifically - A male teacher or instructor in a school, more especially the sole or head teacher; a schoolmaster.n. The navigator of a ship. In the merchant marine the master is the captain or commander. In men-of-war the navigator or sailing-master formerly had the specific title of master, and was a line-officer of the lowest rank. In the British navy his title is now navigating-lieutenant or staff-commander. In the United States navy he is now ranked as lieutenant (junior grade), between eusign and lieutenant, and is called the navigator.n. One who has another or others under his immediate control; a lord paramount or employer of slaves, vassals, domestic servants, workmen, or laborers, etc.; in law, specifically, one who has in his own right and by virtue of contract a legal personal authority over the services of another, such other being called his servant.n. One charged with the care, direction, oversight, or control of some office, business, undertaking, or department: as, Master of the Rolls; a ship-, harbor-, or dock-master; master of the revels, ceremonies, etc.n. One who has the power of controlling or using at pleasure; an owner or proprietor; a disposer.n. A chief; a principal, head, or leader.n. A man eminently or perfectly skilled in something, as an occupation, art, science, or pursuit; one who has disposing or controlling power of any kind by virtue of natural or acquired ability; a proficient; an adept: as, a master of language, or of the violin; a master in art.n. A title of address, formerly in use, corresponding to magister (which see). Abbreviated M.n. A young gentleman; a boy of the better class.n. A title of dignity or office.n. The title of the head of some societies or corporations: as, the grand master of the Knights of Malta; the master of Balliol College; the master of a lodge of freemasons.n. Eccles., a title applied to certain residentiaries in a minster: as, master of the lady chapel, etc.n. In the game of bowls, the jack.n. A husband.n. An equerry; specifically, the third great officer in the British court. He has the management of all the royal stables and bred horses, with authority over all the equerries and pages, coachmen, footmen, grooms, etc. In state cavalcades he rides next to the sovereign.n. See the quotation.Having or exercising mastery; directing or controlling; chief; principal; leading: as, a master mechanic or mariner; a master builder or printer; a master hand in trade.One who employs workmen in building.[caps.] The chief executive officer of the Knights of Labor. [U. S.]To become the master of; subject to one's will, control, or authority; conquer; overpower; subdue.To make one's self master of; overcome the difficulties of; learn so as to be able to apply or use: as, to master a science.To control as master or owner; possess; have power over.To hold the position or relation of master to; be a master to.In a technical use, to season or age.To be skilful; excel.n. A vessel with (a specified number of) masts: in composition: as, a three-master.n.