Countermeasure
A countermeasure is an action or measure that's deployed to negate or reduce the impact of another action. Countermeasures can include an automated missile interception system or a device that jams radar signals. The term countermeasure first appeared in the Merriam-Webster dictionary in 1923.
Countermeasures can be found in the following disciplines:
- Medicine
- Materials engineering
- Electro-magnetic engineering
- Policing
- Information technology
- International Law
- Diplomatic security
- Pollution prevention
- Aviation
Countermeasures can be divided into two categories: "active" and "passive".