- To fasten with a lock, or as with a lock; to make fast; to prevent free movement of; as, to lock a door, a carriage wheel, a river, etc.
- To prevent ingress or access to, or exit from, by fastening the lock or locks of; -- often with up; as, to lock or lock up, a house, jail, room, trunk. etc.
- 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.
- To link together; to clasp closely; as, to lock arms.Lockhand in hand.
- CanalsTo furnish with locks; also, to raise or lower (a boat) in a lock.
- FencingTo seize, as the sword arm of an antagonist, by turning the left arm around it, to disarm him.
