pir
/P IH0 R/noun
- 1
A Muslim holy man or religious leader, especially Sufi.
- 2
(countable, aviation, travel) Initialism of property irregularity report: a form to be filled in when baggage is lost by an airline. [(aviation, travel) An official form to be filled out if checked baggage is lost or damaged by an airline.]
- 3
(uncountable) Initialism of passive infrared.
- 4
(chemistry) Abbreviation of polyisocyanurate. [(organic chemistry) A form of polyurethane polymer, based on cyanuric acid, formed from a polyhydroxy alcohol and a diisocyanate; it forms foams that are used for thermal insulation]
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