n. A teacher; an instructor; a learned man; one skilled in a learned profession.n. In a university, one who has passed all the degrees of a faculty, and is thereby empowered to teach the subjects included in the faculty; a person who has received the highest degree in a faculty: as, a doctor in divinity.n. Specifically A person duly licensed to practise medicine; a physician; one whose occupation is to cure diseases.n. A minor part of certain pieces of machinery employed in regulating the feed or in removing surplus material; specifically, the roller in a power printing-press which serves as a conductor of ink to the distributing rollers (see crab-roller, drop-roller): as, a color-doctor; a cleaning-doctor; a lint-doctor, etc.n. An auxiliary steam-engine; a donkey-engine.n. In wine-making: A liquor used to mix with inferior wine to make it more palatable, or to give it a resemblance to a better wine.n. A liquor used to darken the color of wine, as boiled must mixed with pale sherry to produce brown sherry. See shcrry, mosto, and must.n. A translation of a local name in North Africa of the bird Emberiza striolata. See the extract.n. Same as doctor-fish.n. plural False or doctored dice.n. In some American universities, a degree superior to that of master of arts. Abbreviated Ph. D. See above, 2.To treat, as a doctor or physician; treat medicinally; apply medicines for the cure of; administer medicine or medical treatment to: as, to doctor a disease; to doctor a patient.To repair; mend; patch up.To confer the degree of doctor upon.To disguise by mixture or manipulation; especially, to alter for the purpose of deception; give a false appearance to; adulterate; cook up; tamper with: as, to doctor wine or an account.To practise physic.To receive medical treatment; take medicine: as, to doctor for ague.n. In angling, a name applied to several artificial flies: as, the blue doctor, the silver doctor, etc.n. A boiler feed-pump such as has been preferred on the western rivers of the United States.n. The cook of a merchant vessel; also, the cook of a lumber-camp.