| 1. Incident response is an expedited reaction to an issue or occurrence. The incident is the breach of security. The response depends upon how the security team reacts, what they do to minimize damages, and when they restore resources, all while attempting to guarantee data integrity.
2. Actions taken in order to mitigate the consequences of an incident.
Notes (1) : Incident response is part of the emergency management process.
(Source: ISO 22320:2010 - Societal Security - Emergency Management - Requirements for Command and Control) - clause 3.9
3. The response of an organisation to an incident that may significantly impact the organisation, its people, or its ability to function productively. Concentrates on the safety of personnel.
(Source: ENISA - the European Network and Information Security Agency. BCM & Resilience Glossary)