key card

American  

noun

1. 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

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

Her key card to access Capitol entrances, bathrooms and party workspaces was deactivated, according to the lawsuit.

From Seattle Times • May 1, 2023

“Usually you need a key card, but the doorman vanished. That means the defenses are crumbling. Anyone can walk into the elevator now and head straight up.”

From "The Last Olympian" by Rick Riordan