The method by which a device performs its function.
The method or practice by which actions are done.
The act or process of operating; agency; the exertion of power, physical, mechanical, or moral.
A planned undertaking.
A business or organization.
(medicine) A surgical procedure.
(computing, logic, mathematics) English Wikipedia has an article on:Operation (mathematics)Wikipedia A procedure for generating a value from one or more other values (the operands); a function which maps zero or more (but typically two) operands to a single output value.
(military) A military campaign (e.g. Operation Desert Storm)