[UK] [informal] op [noun] [C]a major/minor/routine operationan abdominal/cataract/transplant operationHe's got to have/undergo an operation for a hernia/an operation on his wrist.We will know in a couple of days if the operation to restore her sight was successful. [+ to infinitive]
OPERATION
Meaning of OPERATION in English
Cambridge English vocab. Кембриджский английский словарь. 2012