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  1. operation
  2. noun

    • 1. the action of functioning or the fact of being active or in effect:

      restrictions on the operation of market forces the company's first hotel is now in operation
      Synonym : functioning, working, running, performance, action, behaviour
    • 2. an active process; a discharge of a function:

      the operations of the mind
    • 3. an act of surgery performed on a patient:

      I've never felt better since my bypass operation
      Synonym : surgery, surgical operation, surgical intervention, major surgery, minor surgery
    • 4. an organized activity involving a number of people:

      a rescue operation Operation Desert Storm
    • 5. a business organization; a company:

      he reopened his operation under a different name
    • 6. an activity in which a business is involved:

      the company is selling most of its commercial banking operations
    • 7. a process in which a number, quantity, expression, etc., is altered or manipulated according to set formal rules, such as those of addition, multiplication, and differentiation.

  3. Variation

    • n.: noun: operation, plural noun: operations