keycode
nounUK /ˈkiːkəʊd/
US /ˈkiːkoʊd/
A keycode is a special number or set of letters that works like a secret key to open or use something.
My dad typed the keycode to unlock the front door.
OTHER MEANINGS
2. A number that stands for a key on a computer keyboard.
The program checks the keycode to know which key you pressed.
3. A code used to open a lock or start a machine.
She entered the keycode to start the car.
4. A secret set of characters used to get into an account or device.
Keep your keycode private so nobody can use your account.