Operation

1. A military campaign. Operation Desert Storm was well planned.
2. The method by which a device performs its function. Do not look at the beam of a laser while it is in operation.
3. A planned undertaking. The police ran an operation to get beggars off the streets.
4. A surgical procedure. She had an operation to remove her appendix.
5. A business or organization. We run our operation from a store front.