n. — Food
sliced meat cooked on an upright spit, served in pita bread with vegetables, sauces and seasoning (see Image 1).
Type: 5. Frequency — This is a fast food item found worldwide in many languages and locations, yet the names vary from place to place. The dish comes from the eastern mediterranean cuisine and its name can be derived from the Turkish words döner 'turning', kebab, the Greek gyro, or the Arabic sh(a)warma. The variant form donair, a phonetic respelling of Turkish döner, is found most commonly in Canada compared with other domains (see Chart 1).
See also COD-2, s.v. "donair", which is marked "N Amer.", and OED-3, s.v. "doner kebab".
Images:

Image 1: A donair. Source: Wikimedia Commons. Photo: S. Wallroth 
Chart 1: Internet Domain Search, 10 Oct. 2012