noun A person or organisation that operates a device, system, service, etc.
The drone crashed because of operator error.
noun A telecommunications facilitator whose job is to connect or otherwise assist callers.
To get an international line, you used to have to go through the operator.
noun A member of a military special operations unit.
noun A surgeon; one who performs medical operations.
noun The game of Chinese whispers.
noun A person who is adept at making deals or getting results, especially one who uses cunning or dishonest methods. Someone who is successful at pursuing women; a player.
noun Someone who is successful at pursuing women; a player.
noun A function or other mapping that carries values defined on a domain into another value or set of values in a defined range.