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PIR. In DICTIOUS you will not only get to know all the dictionary meanings for the word
PIR, but we will also tell you about its etymology, its characteristics and you will know how to say
PIR in singular and plural. Everything you need to know about the word
PIR you have here. The definition of the word
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English
Noun
PIR (plural PIRs)
- (countable, aviation, travel) Initialism of property irregularity report: a form to be filled in when baggage is lost by an airline.
- (uncountable) Initialism of passive infrared.
- (chemistry) Abbreviation of polyisocyanurate.
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