operation

noun

1. 1

   The method by which a device performs its function.

2. 2

   The method or practice by which actions are done.

3. 3

   The act or process of operating; agency; the exertion of power, physical, mechanical, or moral.

4. 4

   A planned undertaking.

   “The Katrina relief operation was considered botched.”

5. 5

   A business or organization.

   “They run a multinational produce-supply operation.”

6. 6

   A surgical procedure.

   “She had an operation to remove her appendix.”

7. 7

   A procedure for generating a value from one or more other values (the operands).

8. 8

   A military campaign (e.g. Operation Desert Storm)

9. 9

   Effect produced; influence.