responder

[ri-spon-der]

noun

a person or thing that responds.
Electronics. the part of a transponder that transmits the reply.

Origin of responder

First recorded in 1875–80; respond + -er¹

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for responder

Contemporary Examples of responder

One responder accused me of not even knowing what racism is.
What We Need Are Anti-Racists
Gene Robinson
August 24, 2014
Social media have created a platform for every single American to become a “virtual first responder,” in word, donation, or deed.
Don’t Be a Tragedy Troll
Joshua DuBois
May 22, 2013
A first responder pushed a wheelchair-bound woman to safety and then returned to the carnage.
Boston Marathon Explosions: The Heroes Who Responded to the Blasts
Nina Strochlic
April 16, 2013
I am told that the first responder who found her looked into her eyes and told her ‘your parents love you.’
New Details Are Released About Contents of the Lanza House
Michael Daly
March 28, 2013
“First of all, you are not going to die,” counseled the first responder, Calimhero.
Reddit Enlists 10,000 Volunteers to Prevent Suicides … They Hope
Jesse Singal
March 8, 2012

Word Origin and History for responder

n.

1845 of devices, 1871 of persons, agent noun from respond (v.).

Online Etymology Dictionary, © 2010 Douglas Harper