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Longman Dictionary of Contemporary English
key card
noun
EXAMPLES FROM CORPUS
▪ A key card numbering the various positions was mounted on the top of the tachistoscope.
▪ The night staff finally congregated outside my room trying endless combinations of key card whilst I ranted and raved.
Wiktionary
key card

n. (alternative spelling of keycard English)

Usage examples of "key card".

I hung the do not disturb sign on the door handle, made sure I had the key card, and left.

On the door was the lettering, UN STAFF ONLY The officer took out a plastic, coded key card and swiped it through the magnetic stripe reader.

On the night of the break-in, every locker had been opened with a valid key card.

The woman spoke, and my answers must have made sense because I handed her my credit card and she handed me a pen, and then a key card, but it was like watching a silent film.

Here's your electronic key card to Room One-Nineteen, ground floor, to your right as you leave the lobby.

He also ordered both the press pass and the key card fingerprintedbut the results were negative on this too.

He also ordered both the press pass and the key card fingerprinted-but the results were negative on this too.