operation

pluraloperations

noun: the act or manner of functioning, especially of a machine, system, or device
- The operation of the machine is smooth and quiet.
noun: an act of surgery performed on a patient
- She is recovering well from her knee operation.
noun: an organized and coordinated activity involving a number of people, especially for a specific purpose
- The rescue operation saved dozens of people from the flood.
noun: a mathematical process, such as addition, subtraction, multiplication, or division, applied to numbers or variables
- Division is an arithmetic operation that splits a quantity into equal parts.
noun: the day‑to‑day activities and processes of a business or organization
- The company's overseas operations have grown significantly this year.