Definition: There are two meanings for first responder:
- The first person to arrive at an emergency scene. Often, first responder is used as a general term for all emergency service personnel who are expected to respond to medical emergencies or large-scale disasters.
- A public safety official -- such as a police officer or firefighter -- certified to provide basic life support skills similar to an EMT. When referring to a certified First Responder, the term is capitalized.