key card

American

noun

a plastic card, similar to a credit card, containing data on an embedded magnetized strip that can electronically unlock a door, activate a machine, etc.

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Once logged in, I had the option to choose between five different filming feeds, each showing several hotel rooms - visible as soon as a guest triggered the electricity supply by inserting their key card.

From BBC • Feb. 5, 2026

With a digital key card for Chuck’s Arcade starting at $10, the buy-in to try out the space isn’t large, but this felt like a tentative step into adulthood.

From Los Angeles Times • Aug. 28, 2025

In fact, the company says it is now properly authorized to use the soap as well as a newly created tool that resembles a key card.

From New York Times • Apr. 11, 2024

And why couldn't I even remember how to use my key card?

From Salon • Sep. 3, 2023

I zip up my jacket and make sure my key card is in the pocket where I always keep it.

From "Isaiah Dunn Is My Hero" by Kelly J. Baptist

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023