Keycard (noun)

A keycard is a small plastic card, typically about the size of a credit card, that is used to gain access to a building or secure area by being inserted into a card reader or swiped through a magnetic reader.

Origin:

The word keycard is a compound word, key and card.

Examples:

1. He used his keycard to gain access to the office.
2. She misplaced her keycard and couldn't enter the building.
3. A keycard is a small plastic card used to gain access to a building or secure area.
4. Keycards are often used in hotels, offices and other buildings for access control.
5. Keycards are typically inserted into a card reader or swiped through a magnetic reader to gain access.