door opener

or door-o·pener


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. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples 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”).