Operation can refer to medical surgery, a military campaign, or mathematical methods, such as multiplication and division.Operation comes from the latin word opus (“work”) and can refer to a …If you have an operation, a doctor cuts your body to remove or repair part of it:Learn more.The meaning of operation is performance of a practical work or of something involving the practical application of principles or processes.How to use operation in a sentence.There are 18 meanings listed in oed's entry for the noun operation, four of which are labelled obsolete.
'Bob Lazar: Area 51' documentary probes UFO whistle-blower's story
'Bob Lazar: Area 51' documentary probes UFO whistle-blower's story

'Bob Lazar: Area 51' documentary probes UFO whistle-blower's story of Operation Disclosure Official: The Truth About Area 51 Finally Revealed! Unbelievable. .

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See ‘meaning & use’ for definitions, usage, and quotation evidence.The fact of operating or being active:The way that parts of a machine or system work….Learn more.An act or instance, process, or manner of functioning or operating.See examples of operation used in a sentence.Definition of operation noun in oxford advanced american dictionary.Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.