Definition of responder in English:

responder

Pronunciation /rəˈspändər/ /rəˈspɑndər/

noun

  • 1A person who replies to something, especially one supplying information for a questionnaire or responding to an advertisement.

    • ‘the vast majority of responders indicated that the advertisement was believable’
  • 2A person who reacts quickly or positively to a stimulus or treatment.

    • ‘the change had already occurred in placebo responders at week one’
  • 3A person trained to respond to and deal with emergencies.

    • ‘these factors facilitated quick pathways for disaster responders’