(colloquial) Indicates that the speaker defers to the addressed person's authority or expertise.

(medicine, derogatory) An incompetent physician.

A terminal research degree and one of the highest doctorates awarded by a university.

A farmer or rural resident with basic medical training who worked as a doctor in rural areas of the People's Republic of China from the mid-1960s until the 1980s, generally under a government-sponsored program.

(transitive) To falsify, or modify something, so that it appears to be better than it is.

A clown who visits hospitals in half-clown and half-doctor garb to entertain young patients.

(medicine, crime) The illegal practice of a patient requesting treatment from multiple physicians in order to obtain prescription drugs, either to feed an addiction or resell them.

(US, colloquial) A psychiatrist.

A person who specialises in the servicing of saws and saw blades

(slang) One who fixes CB radio systems.