operation

Definition

noun
  1. the way in which something operates
  2. a surgical procedure carried out to repair or remove a damaged body part
    Examples She’s had an operation on her foot. • The operation to remove the cataract was successful. • A team of surgeons performed the operation. • Heart operations are always difficult.
    (Note A surgeon performs or carries out an operation on a patient.)
  3. the way in which a drug acts
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