definition of
operation

[1] #1 operation n. the state of being in effect or being operative; "that rule is no longer in operation". wn

[2] #2 operation n. a business especially one run on a large scale; "a large-scale farming operation"; "a multinational operation"; "they paid taxes on every stage of the operation"; "they had to consolidate their operations". wn

[3] #3 operation n. a planned activity involving many people performing various actions; "they organized a rescue operation"; "the biggest police operation in French history"; "running a restaurant is quite an operation"; "consolidate the companies various operations". wn

[4] #4 operation n. (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". wn

[5] #5 operation n. [military operation] activity by a military or naval force (as a maneuver or campaign); "it was a joint operation of the navy and air force". wn