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  1. Dictionary
    operation
    /ˌɒpəˈreɪʃn/

    noun

    • 1. the action of functioning or the fact of being active or in effect: "restrictions on the operation of market forces" Similar functioningworkingrunningperformance
    • 2. an act of surgery performed on a patient: "I've never felt better since my bypass operation" Similar surgerysurgical operationsurgical interventionmajor surgery

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