English
Adjective
keyless (not comparable)
-  Lacking or not requiring a key
-  
2007 April 14,  Micheline Maynard,  “Car Keys Could Go the Way of Tail Fins”, in  New York Times:- Today’s keyless models use a fob — the small remote control device that most modern cars use to lock and unlock doors — but it performs the additional duty of sending a signal to the ignition.