Tir, tir or TIR may refer to:
The modern Persian name for the Zoroastrian god Tishtrya Tir (month), of the Iranian calendar Tir (god), of ancient Armenia Tabar, Iran, a village in North Khorasan Province Old English spelling of the Norse god Týr Tir (demon), son of Iblis TIR (album), a 2010 album by Cerys Matthews
Abbreviations Total internal reflection Tigrinya language, ISO 639 code Tirupati Airport, IATA code Translocated intimin receptor, used by E. coli TIR Convention, (, International Road Transport) Toll-Interleukin receptor Total indicator reading in metrology Thermal Infrared (TIR), also called intermediate infrared (IIR)
Other Tir McDohl, in the video game Suikoden INS Tir, various ships of the Indian navy
See also Tira (disambiguation) Tiran (disambiguation) Tir Planitia, a large basin on Mercury Tír na nÓg, an Otherworld in Irish mythology