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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.

Other Word Forms

Noun Inflected Forms

key cards

plural

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.

See Examples For:

key card

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

As he slipped the key card into the reader on his hotel room door and tried the handle - to no avail - he realised what he had done.

From BBC ● Aug. 15, 2024

At one point during the examination, the air-safety agency observed mechanics at Spirit using a hotel key card to check a door seal, according to a document that describes some of the findings.

From New York Times ● Mar. 11, 2024

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

From Salon ● Sep. 3, 2023

She rolled her eyes but didn’t answer my question as she took out her key card.

From "Here to Stay" by Sara Farizan

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