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  1. Dictionary
    operation
    /ˌɒpəˈreɪʃn/

    noun

    • 1. the action of functioning or the fact of being active or in effect: "restrictions on the operation of market forces" Similar functioningworkingrunningperformance
    • 2. an act of surgery performed on a patient: "I've never felt better since my bypass operation" Similar surgerysurgical operationsurgical interventionmajor surgery

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    More definitions, origin and scrabble points

  2. dictionary.cambridge.org › dictionary › englishOPERATION | English meaning - Cambridge Dictionary

    OPERATION definition: 1. the fact of operating or being active: 2. the way that parts of a machine or system work…. Learn more.

  3. www.merriam-webster.com › dictionary › operationOperation Definition & Meaning - Merriam-Webster

    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.

  4. www.collinsdictionary.com › dictionary › englishOPERATION definition and meaning | Collins English Dictionary

    the act, process, or manner of operating. 2. the state of being in effect, in action, or operative (esp in the phrases in or into operation) 3. a process, method, or series of acts, esp of a practical or mechanical nature. 4. surgery.

  5. dictionary.cambridge.org › us › dictionaryOPERATION | definition in the Cambridge English Dictionary

    OPERATION meaning: 1. the fact of operating or being active: 2. the way that parts of a machine or system work…. Learn more.

  6. www.dictionary.com › browse › operationOPERATION Definition & Meaning | Dictionary.com

    Operation definition: an act or instance, process, or manner of functioning or operating.. See examples of OPERATION used in a sentence.

  7. www.vocabulary.com › dictionary › operationOperation - Definition, Meaning & Synonyms | Vocabulary.com

    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 whole range of practical activities and work.

  8. www.oxfordlearnersdictionaries.com › us › definitionoperation noun - Definition, pictures, pronunciation and usage...

    operation. noun. OPAL W OPAL S. /ˌɒpəˈreɪʃn/ /ˌɑːpəˈreɪʃn/ medical. ( also British English, informal op) [countable] the process of cutting open a part of a person’s body in order to remove or repair a damaged part. Will I need to have an operation? He underwent a three-hour heart operation.

  9. dictionary.cambridge.org › dictionary › learner-englishOPERATION | meaning - Cambridge Learner's Dictionary

    OPERATION definition: 1. If you have an operation, a doctor cuts your body to remove or repair part of it: 2. an…. Learn more.

  10. www.thefreedictionary.com › operationOperation - definition of operation by The Free Dictionary

    1. The act or process of operating or functioning. 2. The state of being operative or functional: a factory in operation. 3. A process or series of acts involved in a particular form of work: the operation of building a house. 4. An instance or method of efficient, productive activity: That restaurant is quite an operation. 5.

  11. www.ldoceonline.com › dictionary › operationoperation | meaning of operation in Longman Dictionary of...

    THESAURUS operation noun [ countable] the process of cutting into someone’s body to repair or remove a part that is damaged He had an operation to remove a blood clot from his brain. procedure noun [ countable] an operation performed in a particular way on a particular part of the body.