1. the process of working or functioning
2. a planned activity or series of activities for a particular purpose
3. a medical procedure performed on a patient
Usage: medical

Examples

• The operation of the new machine is very smooth.
• The rescue operation saved dozens of lives.
• She needs an operation to repair her knee.
• Addition is a basic mathematical operation.
• They run a small farming operation in Iowa.
• The factory resumed operation after the repairs.
• The military operation was kept secret.
• The operation was successful and the patient recovered quickly.