door opener

or door-opener

noun

  1. a mechanism that automatically opens a door, as of a garage, when actuated by a radio transmitter, electric eye, or other device.

  2. Informal. something that is effective in leading to opportunity or success: Sales experience can be a door opener for young executives.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

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