lock in WordNet English dictionary

1. a strand or cluster of hair
   lock  curl  ringlet  whorl 
   
2. a restraint incorporated into the ignition switch to prevent the use of a vehicle by persons who do not have the key
   lock  ignition lock 
   
3. any wrestling hold in which some part of the opponent's body is twisted or pressured
   lock 
   
4. a fastener fitted to a door or drawer to keep it firmly closed
   lock 
   
5. enclosure consisting of a section of canal that can be closed to control the water level; used to raise or lower vessels that pass through it
   lock  lock chamber 
   
6. a mechanism that detonates the charge of a gun
   lock 
   

1. keep engaged
   "engaged the gears"
   engage  mesh  lock  operate 
   
2. hold in a locking position
   "He locked his hands around her neck"
   lock  interlock  interlace 
   
3. become engaged or intermeshed with one another
   "They were locked in embrace"
   interlock  lock 
   
4. become rigid or immoveable
   "The therapist noticed that the patient's knees tended to lock in this exercise"
   lock 
   
5. fasten with a lock
   "lock the bike to the fence"
   lock 
   
6. place in a place where something cannot be removed or someone cannot escape
   "The parents locked her daughter up for the weekend"; "She locked her jewels in the safe"
   lock in  lock away  lock  put away  shut up  shut away  lock up 
   
7. build locks in order to facilitate the navigation of vessels
   lock 
   
8. hold fast (in a certain state)
   "He was locked in a laughing fit"
   lock 
   
9. pass by means through a lock in a waterway
   lock