operation

US /ˌɑpəˈreʃən/

UK /ˌɒpəˈreɪʃn/

A2

noun

  • Business or company, or its activities
  • Functioning; use
  • Medical procedure involving surgery
  • The activities involved in running a business or organization.
  • A mathematical process, such as addition, subtraction, multiplication, or division.
  • A surgical procedure performed to treat a medical condition.
  • A planned military activity or mission.
  • A process or series of actions performed to achieve a specific result.
  • A secret or clandestine activity.

Examples

UN troops supervised the relief operations.

the surgeon performing the operation