operation (Noun) — The state of being in effect or being operative. ex. "that rule is no longer in operation"
operation (Noun) — A business especially one run on a large scale. ex. "a large-scale farming operation" ex. "a multinational operation" ex. "they paid taxes on every stage of the operation" ex. "they had to consolidate their operations"
operation (Noun) — A planned activity involving many people performing various actions. ex. "they organized a rescue operation" ex. "the biggest police operation in French history" ex. "running a restaurant is quite an operation" ex. "consolidate the companies various operations"
operation (Noun) — (computing) data processing in which the result is completely specified by a rule (especially the processing that results from a single instruction). ex. "it can perform millions of operations per second"
operation (Noun) — (military) activity by a military or naval force (as a manoeuvre or campaign). ex. "it was a joint operation of the navy and air force"
operation (Noun) — (surgery) a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body. ex. "they will schedule the operation as soon as an operating room is available"
operation (Noun) — A process or series of acts especially of a practical or mechanical nature involved in a particular form of work. ex. "the operations in building a house" ex. "certain machine tool operations"
operation (Noun) — Process or manner of functioning or operating. ex. "the power of its engine determines its operation" ex. "the plane's operation in high winds"
operation (Noun) — (psychology) the performance of some composite cognitive activity; an operation that affects mental contents. ex. "the cognitive operation of remembering"
operation (Noun) — (mathematics) calculation by mathematical methods. ex. "they were learning the basic operations of arithmetic"
operation (Noun) — The activity of operating something (a machine or business etc.). ex. "her smooth operation of the vehicle gave us a surprisingly comfortable ride"