responder

[ri-spon-der]

noun

1. a person or thing that responds.

2. Electronics.,  the part of a transponder that transmits the reply.

Word History and Origins

Origin of responder¹

First recorded in 1875–80; respond + -er ¹

Example Sentences

Retained firefighters - predominantly based in rural areas with a lower population density than bigger cities - are on-call emergency responders who live near their local fire station and jump in an appliance when needed.

From BBC

Mayor Karen Bass wrote in a post on X. “I want to thank all first responders who are at the scene — my office will continue to monitor the situation.”

From Los Angeles Times

Firefighters and emergency responders searched into the afternoon for anyone who may have been trapped under the mounds of rubble outside the building, which is part of a public housing development in the Bronx.

From BBC

This left first responders without an aerial view of the flames, reducing their awareness of the fire direction.

From Los Angeles Times

Residents and emergency responders were helped by paramedics called to a shop in Bloxwich, West Midlands, on Friday night.

From BBC