pin pin /ˈpɪn/

noun

1. () A piece of jewelry that is pinned onto the wearer's garment  ( pin )
   a piece of jewelry that is pinned onto the wearer's garment
   
2. A club-shaped wooden object used in bowling; set up in triangular groups of ten as the target  ( bowling pin , pin )
   a club-shaped wooden object used in bowling; set up in triangular groups of ten as the target
    He rolled the bowling ball down the lane, hoping to knock down all ten pins in one shot
   He rolled the bowling ball down the lane, hoping to knock down all ten pins in one shot
   
   
3. A holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowing  ( oarlock [ N. American] , peg , pin , rowlock [British] , thole , tholepin )
   a holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowing
   
   
4. A small slender (often pointed) piece of wood or metal used to support, fasten or attach things  ( pin )
   a small slender (often pointed) piece of wood or metal used to support, fasten or attach things
   
5. Flagpole used to mark the position of the hole on a golf green  ( flag , pin )
   flagpole used to mark the position of the hole on a golf green
    The golfer's approach shot landed just a few feet from the flag
   The golfer's approach shot landed just a few feet from the flag
   
   
6. 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 )
   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
   
   
7. Axis consisting of a short shaft that supports something that turns  ( pin , pivot )
   axis consisting of a short shaft that supports something that turns
   
   
8. Informal terms for the leg  ( peg , pin , stick )
   informal terms for the leg
    Fever left him weak on his sticks
   fever left him weak on his sticks
   
9. Small markers inserted into a surface to mark scores or define locations etc.  ( peg , pin )
   small markers inserted into a surface to mark scores or define locations etc.
   
   
10. When a wrestler's shoulders are forced to the mat  ( fall , pin )
    when a wrestler's shoulders are forced to the mat
     The wrestler executed a perfect takedown, and his opponent fell to the ground
    The wrestler executed a perfect takedown, and his opponent fell to the ground
    

verb

1. () To hold fast or prevent from moving  ( immobilise [British] , immobilize , trap , pin )
   to hold fast or prevent from moving
    The child was pinned under the fallen tree
   The child was pinned under the fallen tree
   
2. () Attach or fasten with pins  ( pin )
   attach or fasten with pins
    Pin the needle to the shirt
   pin the needle to the shirt
   
3. (chess) immobilize a piece  ( pin )
   (chess) immobilize a piece
   
4. Pierce with a pin  ( pin )
   pierce with a pin
    Pin down the butterfly
   pin down the butterfly
   

 PIN

noun

1. A number you choose and use to gain access to various accounts  ( personal identification number , PIN , PIN number )
   a number you choose and use to gain access to various accounts
    I had to remember my PIN number to access my account
   I had to remember my PIN number to access my account