operation

1. (uncountable) The method by which a device performs its function.Examples: "It is dangerous to look at the beam of a laser while it is in operation."uncountable

2. (uncountable) The method or practice by which actions are done.uncountable

3. (uncountable) The act or process of operating (verb): agency; the exertion of power, physical, mechanical, or moral.Examples: "the pain and sickness caused by manna are confessedly nothing but the effects of its operations on the stomach and guts."; "Speculative painting, without the assistance of manual operation, can never attain to perfection."Synonyms: operating#Noununcountable

4. (countable) A planned undertaking.Examples: "The police ran an operation to get vagrants off the streets."; "The Katrina relief operation was considered botched."countable

5. (countable) A business or organization.Examples: "We run our operation from a storefront."; "They run a multinational produce-supply operation."countable

6. (countable, medicine) A surgical procedure.Examples: "She had an operation to remove her appendix."; "This done, ſhe performs the very ſame Operation on the other Side of the Cock's Body, and there takes out the other Stone; then ſhe ſtitches up the Wounds, and lets the Fowl go about as at other Times, till the Capon is fatted in a Coup, which is commonly done from Chriſtmas to Candlemas, and after."countable