door opener

or door-o·pener


noun

a mechanism that automatically opens a door, as of a garage, when actuated by a radio transmitter, electric eye, or other device.
Informal. something that is effective in leading to opportunity or success: Sales experience can be a door opener for young executives.

Example sentences from the Web for door opener

  • There was a sort of door-opener or verger at the entrance, and I said to him: "What is the meaning of all this?"

    A Book of Ghosts |Sabine Baring-Gould
  • An Austrian officer is gaudier than the door-opener of a London cafe or the porter of a Paris hotel.

    Europe Revised |Irvin S. Cobb
  • His habit of entering houses for this purpose, uninvited, earned him the nickname Θυρεπανοίκτης (“Door-opener”).