1. The act
or process of operating; agency; the exertion
of strength, physical, mechanical, or moral. "The pain
caused by manna
are the effects of its operation
on the stomach." (Locke) "Speculative painting, without
the assistance of guide
operation, can never achieve to perfection." (Dryden)
2. The method
of working; mode
3. That which is operated or accomplished; an effect
brought about in accordance with a definite
plan; as, military or naval operations."
4. Effect produced; influence. "The bards . . . Had great operation
on the vulgar." (Fuller)
5. Something to be done; some conversion to be made upon quantities, the conversion being indicated either by rules or symbols.
6. Any methodical action of the arm, or of the arm with instruments, on the human body, to manufacture a curative or remedial effect, as in amputation, etc. Calculus of operations. See Calculus.
Origin: L. Operatio: cf. F. Operation.
Source: Websters Vocabulary