FIR
Look up fir in Wiktionary, the free dictionary.
A fir is a type of evergreen coniferous tree.
Fir, FIR or F.I.R. may also refer to:
Entertainment
- F.I.R., a Taiwanese pop music group
 - F.I.R. (album)
 - F. I. R. (1999 film), an Indian Malayalam-language action film
 - F.I.R No. 339/07/06, a 2021 Indian Bengali-language crime thriller film
 - FIR (2022 film), an Indian Tamil-language action thriller film
 - F.I.R. (TV series), an Indian sitcom
 - Falling in Reverse, an American rock band
 
Science and technology
- Far infrared
 - Finite impulse response, a type of filter in signal processing
 - Free ideal ring
 - Flight information region
 - FiR 1, the first nuclear reactor in Finland
 - Research Institute for Operations Management (German: Forschungsinstitut für Rationalisierung), in Germany
 
Other uses
- Fir, an alternative spelling of Fier, a city in Albania
 - Firan language (ISO 639-3 language code: fir)
 - First information report, a police document in some countries
 - Flats Industrial Railroad, a former US company
 - International Federation of Resistance Fighters – Association of Anti-Fascists (French: FIR Fédération Internationale des Résistantes – Association des Antifascistes)
 - Italian Rugby Federation (Italian: Federazione Italiana Rugby)
 - USCGC Fir, 2 US Coast Guard ships