Dair is the seventh letter of the Irish Ogham alphabet.
Dair or DAIR may also refer to:
Al Dair, a village in Bahrain Dair (name), a given name or surname Dair language, a Nubian language of Sudan D&I Railroad, a freight railroad in the United States Distributed Artificial Intelligence Research Institute, or DAIR Institute Down Air, a move in Super Smash Bros.