fob
noun
\ ˈfäb
\
\
Definition of fob
(Entry 1 of 3)
1
: watch pocket
2
: a short strap, ribbon, or chain attached especially to a pocket watch
3
: an ornament attached to a fob chain
4
or key fob
: an object attached to a key chain or key ring
especially
: a small electronic device used typically in place of a key (as to unlock a door or start a vehicle) or to remotely initiate the action of another device (such as a garage door)
Wireless systems are triggered by pressing a button on a remote fob much like those used for car alarms. — Max Alexander The remote-start key fob has a range of several hundred feet, allowing you to start the car's engine from inside your home. — Consumer Reports