What does OPERATION mean?

noun

1. the state of being in effect or being operative“that rule is no longer in operation”
2. a business especially one run on a large scale“a large-scale farming operation”
3. a planned activity involving many people performing various actions“they organized a rescue operation”
4. (computer science) data processing in which the result is completely specified by a rule (especially the processing that results from a single instruction)“it can perform millions of operations per second”
5. activity by a military or naval force (as a maneuver or campaign)“it was a joint operation of the navy and air force”
6. a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body“they will schedule the operation as soon as an operating room is available”
7. a process or series of acts especially of a practical or mechanical nature involved in a particular form of work“the operations in building a house”
8. process or manner of functioning or operating“the power of its engine determines its operation”