• Pir is the term for a Muslim Sufi teacher and master. The students and followers of a Pir are known as Murids.
• Pir is the term for a pilgrimage site in Persian, frequently one of the Zoroastrian faith
• Pir, King of the Britons
• Pir is the Persian word for "old". When preceding a Persian name, the word indicates homage payed to the so titled, usually a sage or wise elder
• PIR is an acronym for the Protein Information Resource, a major protein information database and bioinformatics resource
• PIR is an acronym for Partners in Research, a Canadian charity dedicated to bio-medical research
• PIR is an acronym for Parrot Intermediate Representation, part of Parrot
• PIR is an acronym for Passive infrared sensors, and often used as part of a security system
• PIR is an acronym for Parachute Infantry Regiment
• PIR is an acronym for the Public Interest Registry, a not-for-profit corporation responsible for managing the .org top-level domain.
• PIR is an acronym for Public Information Research, a non-profit corporation that maintains Namebase, an online database of citations to influential people
• PIR is an acronym for Private information retrieval, a protocol that allows a user to retrieve an item from a server in possession of a database without revealing which item she is retrieving.
• PIR is Polyisocyanurate, a plastic typically produced as a foam for thermal insulation
• Parent(s) In Room, signifying to people in chat rooms or instant message conversations that someone's parents are in the room and to watch what is said.
• PIR is an acronym for the Ontario Ministry of Public Infrastructure Renewal
• PIR is also an acronym for Post-Implementation Review

Race tracks

• PIR is an initialism for the Phoenix International Raceway
• PIR is an initialism for the Portland International Raceway

Pir | Pir