• A change in the behavior, operation, or function of a component, circuit, device, piece of equipment, system, mechanism, process, material, or the like, as a consequence of a change in its external or internal environment. For example, a change in output resulting from a change in input.
  • A quantified response (1), such as a frequency response.
  • The automatic emission of the appropriate signals when specified trigger signals are received, as seen, for instance, in a responder (1). Also called reply.
  • synonym reply

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