Look up pin in Wiktionary, the free dictionary.

A pin is a device used for fastening objects or material together.

Pin or PIN may also refer to:

Award pin, a small piece of metal or plastic with a pin attached given as an award for some achievement
lapel pin, a small brooch often worn on the lapel of a dress jacket
People In Need (disambiguation) (PIN), various NGOs and charities
PIN Group, a German courier and postal services company
Postal Index Number, used in India, often called a PIN code
Progressive inflammatory neuropathy, a type of neuropathy that causes acute paralysis, weakness, and numbness
Prostatic intraepithelial neoplasia, a microscopic lesion in the prostate
Police Information Notice, a notice issued by police in the UK

Science and technology

Personal identification number (PIN), a password used to access an automated teller machine or other secured system
- Blackberry PIN, an eight character hexadecimal identification number assigned to a BlackBerry device
Pin, half a firkin, or 4.5 imperial gallons
Lead (electronics), an electric interconnection, in electrical engineering
Bridge pin, a vertical wire on the bridge of keyboard instruments such as the piano and harpsichord that is used to control the string resonances
A pin or peg holding joints together in timber framing, particularly the mortise and tenon joint; rarely called a dowel
PIN diode or P-I-N junction, (p-type, intrinsic, n-type diode), a type of semiconductor diode junction
The Center pin of railway vehicles
PIN (debit card), a Dutch debit card provided by Currence

Computing

Pin (film), a 1989 cult horror movie
"Pin" (song), a song by the Yeah Yeah Yeahs from their debut album, Fever to Tell (2003)
Image of Pinterest
- "Pin it": button to share these images

Pin (chess), a scenario where if a lesser piece is under attack and moves away, it would reveal a more valuable piece
Pin (amateur wrestling), the primary way of winning an amateur wrestling match
Pin (professional wrestling), a way of winning a professional wrestling match
Pin (bridge), a maneuver in the game of bridge to drop an opponent's lower-ranking card by leading a high one
Bowling pins, which must be knocked down by the bowling ball