1. A teacher; one skilled in a profession, or branch of knowledge learned man. One of the doctors of Italy, Nicholas Macciavel. (Bacon)
2. 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.
3. One duly licensed to practice medicine; a member of the medical profession; a physician. By medicine life may be prolonged, yet death Will seize the doctor too. (Shak)
4. 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 colouring matter; the doctor, or auxiliary engine, called also donkey engine.
5. (Science: zoology) The friar skate. Doctors Commons. See Commons. Doctors stuff, physic, medicine.
(Science: zoology) doctor fish, any fish of the genus Acanthurus; the surgeon fish; so called from a sharp lancetlike spine on each side of the tail. Also called barber fish. See surgeon fish.
Origin: OF. Doctur, L. Doctor, teacher, fr. Docere to teach. See Docile.
6. To treat as a physician does; to apply remedies to; to repair; as, to doctor a sick man or a broken cart.
7. To confer a doctorate upon; to make a doctor.
8. To tamper with and arrange for one's own purposes; to falsify; to adulterate; as, to doctor election returns; to doctor whisky.
Origin: Doctored; Doctoring.