pin in WordNet English dictionary

1. a club-shaped wooden object used in bowling; set up in triangular groups of ten as the target
   bowling pin  pin 
   
2. when a wrestler's shoulders are forced to the mat
   fall  pin 
   
3. flagpole used to mark the position of the hole on a golf green
   pin  flag 
   
4. a holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowing
   peg  pin  thole  tholepin  rowlock  oarlock 
   
5. informal terms for the leg
   "fever left him weak on his sticks"
   pin  peg  stick 
   
6. small markers inserted into a surface to mark scores or define locations etc.
   peg  pin 
   
7. a small slender (often pointed) piece of wood or metal used to support or fasten or attach things
   pin 
   
8. a piece of jewelry that is pinned onto the wearer's garment
   pin 
   
9. axis consisting of a short shaft that supports something that turns
   pivot  pin 
   
10. cylindrical tumblers consisting of two parts that are held in place by springs; when they are aligned with a key the bolt can be thrown
    pin  pin tumbler 
    

1. to hold fast or prevent from moving
   "The child was pinned under the fallen tree"
   trap  pin  immobilize  immobilise 
   
2. immobilize a piece
   pin 
   
3. attach or fasten with pins or as if with pins
   "pin the needle to the shirt". "pin the blame on the innocent man"
   pin 
   
4. pierce with a pin
   "pin down the butterfly"
   pin