a teacher; one skilled in a profession, or branch of knowledge learned man.-an academical title, originally meaning a men so well versed in his department as to be qualified to teach it. hence: one who has taken the highest degree conferred by a university or college, or has received a diploma of the highest degree; as, a doctor of divinity, of law, of medicine, of music, or of philosophy. such diplomas may confer an honorary title only.-one duly licensed to practice medicine; a member of the medical profession; a physician.-any mechanical contrivance intended to remedy a difficulty or serve some purpose in an exigency; as, the doctor of a calico-printing machine, which is a knife to remove superfluous coloring matter; the doctor, or auxiliary engine, called also donkey engine.-the friar skate.-to treat as a physician does; to apply remedies to; to repair; as, to doctor a sick man or a broken cart.-to confer a doctorate upon; to make a doctor.-to tamper with and arrange for one's own purposes; to falsify; to adulterate; as, to doctor election returns; to doctor whisky.-to practice physic.