FIR
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English
[edit]Adjective
[edit]FIR (not comparable)
- (signal processing, of a filter) Initialism of finite impulse response; that has impulse response (or response to any finite length input) of finite duration.
Noun
[edit]FIR (countable and uncountable, plural FIRs)
- (aviation) Initialism of flight information region; a specified region of airspace in which a flight information service (FIS) and an alerting service (ALRS) are provided
- (South Asia, Singapore, law enforcement) Initialism of first information report.
- (uncountable) Abbreviation of far infrared or far infrared radiation.
Related terms
[edit]flight information region
infrared