Definition of Pin

Noun: pin pin

A small slender (often pointed) piece of wood or metal used to support, fasten or attach things
A piece of jewellery that is pinned onto the wearer's garment
When a wrestler's shoulders are forced to the mat
- fall
A small marker inserted into a surface to mark scores or define locations etc.
- peg
Informal term for the leg
"fever left him weak on his pins";
- peg, stick
Axis consisting of a short shaft that supports something that turns
- 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
- pin tumbler
Flagpole used to mark the position of the hole on a golf green
- flag
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 [Brit], oarlock [N. Amer]
A club-shaped wooden object used in bowling; set up in triangular groups of ten as the target
- bowling pin

Verb: pin (pinned,pinning) pin

To hold fast or prevent from moving
"The child was pinned under the fallen tree";
- trap, immobilize, immobilise [Brit]
Attach or fasten with pins or as if with pins
"pin the needle to the shirt". "pin the blame on the innocent man"
Pierce with a pin
"pin down the butterfly"
(chess) immobilize a piece

Noun: PIN pin

A number you choose and use to gain access to various accounts
- personal identification number, PIN number