operation

The word "operation" has a broad range of meanings, but they are connected by one main idea: organized action done for a purpose. For many people, the first meaning is a medical procedure performed by a surgeon, such as removing an appendix or repairing the heart. This is the sense used when someone says a patient is "having an operation."

But the word is also widely used outside medicine. An operation can be a planned activity carried out to reach a goal, especially when it involves coordination and clear steps. A rescue operation, police operation, military operation, or business operation all fit this meaning. In these cases, the word points to organized effort rather than a single act.

The word can also refer to how something works or runs. If a factory is in operation, it is running. If a company handles its daily operations well, its regular work is being managed effectively. In mathematics and computer science, an operation is an action performed on numbers, symbols, or data, such as addition, subtraction, or sorting.

Whether it appears in a hospital, a rescue mission, a business, or a computer program, "operation" usually suggests structure, purpose, and action. It is a word for something being done in a careful, organized way, or for the process by which something functions.