Definition of key card in English:

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key card

noun

A small plastic card, sometimes used instead of a door key in hotels, bearing magnetically encoded data that can be read and processed by an electronic device.
Example sentences
  • When she reached the door she inserted the card key and pulled it back.
  • He watched as she swiped the card key through the security lock of the door.
  • Taking my purse, I stuffed into it my card key and plane ticket.

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