Lock

Examples of usage:

1. " Clear the lock," Rip ordered.
   "Rip Foster in Ride the Gray Planet", Harold Leland Goodwin.
2. " Beudant," said Marion, " lock that door quick!"
   "First Person Paramount", Ambrose Pratt.
3. Dale entered, turning the key in the lock behind her.
   "The Bat", Avery Hopwood Mary Roberts Rinehart.