securitycard
nounUK /sɪˈkjʊərəti kɑːd/
US /sɪˈkjʊrəti kɑːrd/
A small card that lets you get into a safe place.
Dad swiped his security card to open the office door.
OTHER MEANINGS
2. A card that proves who you are at a building or event.
Show your security card at the front desk before you go in.
3. A card used to turn alarms on or off.
The guard used a security card to switch off the alarm.
4. A card that keeps your computer or account safe.
He keeps his security card in his wallet so no one can log in.