To fasten in or out, or to make secure by means of, or as
   with, locks; to confine, or to shut in or out -- often with up; as, to
   lock one's self in a room; to lock up the prisoners; to lock up one's
   silver; to lock intruders out of the house; to lock money into a vault;
   to lock a child in one's arms; to lock a secret in one's breast.