n.

1. a piece of jewelry that is pinned onto the wearer's garment
2. when a wrestler's shoulders are forced to the mat;
   fall
3. small markers inserted into a surface to mark scores or define locations etc.;
   peg
4. a number you choose and use to gain access to various accounts;
   personal identification number, PIN, PIN number
5. informal terms of the leg;
   peg, stick
   
   • fever left him weak on his sticks
6. axis consisting of a short shaft that supports something that turns;
   pivot
7. 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
8. flagpole used to mark the position of the hole on a golf green;
   flag
9. a small slender (often pointed) piece of wood or metal used to support or fasten or attach things
10. a holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowing;
    peg, thole, tholepin, rowlock, oarlock
11. a club-shaped wooden object used in bowling; set up in triangular groups of ten as the target;
    bowling pin

v.

1. to hold fast or prevent from moving;
   trap, immobilize, immobilise
   
   • The child was pinned under the fallen tree
2. attach or fasten with pins
3. pierce with a pin
   
   • pin down the butterfly
4. immobilize a piece