Wiktionary
n. An electronic lock operated by a keycard.
Wikipedia
A keycard lock is a lock operated by a keycard, a flat, rectangular plastic card with identical dimensions to that of a credit card or American and EU driver's license which stores a physical or digital signature which the door mechanism accepts before disengaging the lock.
There are several common types of keycards in use, including the mechanical holecard, barcode, magnetic stripe, Wiegand wire embedded cards, smart card (embedded with a read/write electronic microchip), and RFID proximity cards.
Keycards are frequently used in hotels as an alternative to mechanical keys.
The first commercial use of key cards was at automated parking lots to raise and lower the gate where users paid a monthly fee.
Usage examples of "keycard lock".
Like most of the office buildings in Washington, it had a keycard lock.