What does auto responder mean?

auto responder meaning in Urban Dictionary

a nerdish plugin that automatically responds to a contact answer

auto responder meaning in Law Dictionary

program that responds to e-mails with key words instantly.

auto responder meaning in Business Dictionary

computer system system that immediately reacts to an email which contains prescribed terms (keywords) for particular actions because of the obtaining computer system, such as giving a requested file or incorporating a name to a mailing listing.