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English definition of “operation”

operation

noun [C] (MEDICAL PROCESS)    /ˌɒp.ərˈeɪ.ʃən/ US  /ˌɑː.pəˈreɪ-/ (UK informal op)
B1 an occasion when a doctor cuts a body for medical reasons in order to repair, remove, or replace an unhealthy or damaged part: a major/minor/routine operation an abdominal/cataract/transplant operation He's got to have an operation on his shoulder. [+ to infinitive] We will know in a couple of days if the operation to restore her sight was successful.Surgery
(Definition of operation noun (MEDICAL PROCESS) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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