From The Collaborative International Dictionary of English v.0.48:

Operation \Op`er*a"tion\, n. [L. operatio: cf. F. op['e]ration.]
   1. The act or process of operating; agency; the exertion of
      power, physical, mechanical, or moral.
      [1913 Webster]

            The pain and sickness caused by manna are the
            effects of its operation on the stomach. --Locke.
      [1913 Webster]

            Speculative painting, without the assistance of
            manual operation, can never attain to perfection.
      [1913 Webster]

   2. The method of working; mode of action.
      [1913 Webster]

   3. That which is operated or accomplished; an effect brought
      about in accordance with a definite plan; as, military or
      naval operations.
      [1913 Webster]

   4. Effect produced; influence. [Obs.]
      [1913 Webster]

            The bards . . . had great operation on the vulgar.
      [1913 Webster]

   5. (Math.) Something to be done; some transformation to be
      made upon quantities or mathematical objects, the
      transformation being indicated either by rules or symbols.
      [1913 Webster]

   6. (Surg.) Any methodical action of the hand, or of the hand
      with instruments, on the human body, to produce a curative
      or remedial effect, as in amputation, etc.
      [1913 Webster]

   Calculus of operations. See under Calculus.
      [1913 Webster]
Feedback Form