- operation is part of the Basic English 850.
- (UK) IPA: /ˌɒpəˈɹeɪʃən/, SAMPA: /%Qp@"reIS@n/
- (US) IPA: /ˌɑːpəˈɹeɪʃən/, SAMPA: /%A:p@"reIS@n/
- Audio (US)help, file
- The actions of a group of people working for a goal (often military).
- The Army operation was a success.
- A medical process, often opening the human body.
- The doctors performed the operation in three hours.