operation
//ˌɒpəˈreɪʃən//
Noun
operationSingular
operationsPlural
1
A planned activity or series of actions carried out for a specific purpose
The rescue operation was completed successfully.
2
A medical procedure performed by a surgeon to treat injury or disease
She had an operation on her knee last month.
3
A mathematical process such as addition, subtraction, multiplication, or division
Addition and subtraction are basic mathematical operations.
4
The functioning or working of something
The operation of the machine is fully automatic.
5
A business organization or company
They run a small family operation in the countryside.
6
A military action or campaign
The military operation was planned carefully to minimize casualties.