What is the meaning of pin?

noun

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

verb

• To hold fast or prevent from moving.
  • usage: "The child was pinned under the fallen tree"
  • synonyms: trap, immobilize, immobilise
• Attach or fasten with pins or as if with pins.
  • usage: "pin the needle to the shirt". "pin the blame on the innocent man"
• Pierce with a pin.
  • usage: "pin down the butterfly"
• Immobilize a piece. .