response

plural of responder

(obsolete) Response, answer. / (now rare) Correspondence, agreement.

Alternative form of respondence

plural of respondence

plural of responding

A member of an emergency service who is first on the scene, or among those first on the scene, at an emergency. / A member of an emergency service trained to provide emergency medical care.

(mathematics) dependent variable

plural of first responder

Someone who does not respond.