Sir is a respectful form of address for a man, and a formal title used in the United Kingdom for knights and baronets.
Sir, SIR or SiR may also refer to:
Places
Iran
- Sir, Iran, a city in Fars Province
- Sir, Razavi Khorasan, a village in Razavi Khorasan Province
- Sir, West Azerbaijan, a village in West Azerbaijan Province
West Bank
- Sir, Jenin, a Palestinian village in Jenin district
- Sir, Tulkarm, a Palestinian village in Tulkarm district
Others
- Sir Creek, on the border between India and Pakistan
People
- Sir (singer), American singer, songwriter, record producer
- Jaroslav Šír (born 1923), Czechoslovak former skier
- József Sir (1912–1996), Hungarian sprinter
- Sedat Sir (born 1975), Turkish-Australian former Australian Rules footballer
Entertainment
- Sir (1993 film), a Bollywood film
- Sir (A Series of Unfortunate Events), a fictional character in A Series of Unfortunate Events
- Sir (album), by Fischerspooner
- Sir (2018 film), an Indian Hindi-language romantic drama film
- "Sir", a song by Nicki Minaj from Queen
- Sir (2024 film), an Indian Tamil-language action drama film
SIR
Organizations
- Sigma Iota Rho, a collegiate honour society for international studies
- Society of Interventional Radiology, an American organization of health professionals
- Sons In Retirement (SIR), a fraternal organization of retired men
Mathematics and statistics
- Sequential Importance Resampling, in mathematics, a particle filtering algorithm
- Signal-to-interference ratio, in telecommunication, the ratio of useful signal versus co-channel interference received
- Short interest ratio, a metric signalling prevailing investors' sentiment
- SIR model, a compartmental model of the progress of an epidemic
Other uses
- SIR proteins (silent information regulator), in molecular biology
- Saskatchewan International Raceway, a Saskatoon drag strip
- Security Industry Registry, a corporate service provided by the New South Wales Police Force
- Siantar railway station, Pematang Siantar, Indonesia (station code: SIR)
- Singapore Infantry Regiment, the main formation of the Singapore Army
- Sion Airport (IATA code: SIR), the airport in Sion, Switzerland
- South Indian Railway, an early Indian railway company
- Staten Island Railway, rapid transit line in the borough of Staten Island, New York, United States
- Statutory Invention Registration, publication of an invention by the United States Patent and Trademark Office
- Surrey Iron Railway, a horse-drawn plateway that linked the former Surrey towns of Wandsworth and Croydon
- Serial Infrared, a category of Infrared Data Association
- Secondary Image Registration, a type of passive autofocus
- Supplemental Inflatable Restraint or airbag, a vehicle safety device
Other uses
See also
Topics referred to by the same term
This disambiguation page lists articles associated with the title Sir.If an internal link led you here, you may wish to change the link to point directly to the intended article. Categories: