Rail

Look up rail in Wiktionary, the free dictionary.

Rail or rails may refer to:

Rail transport

A generic term for railroads, railways, rail transport, and related matters
Track (rail transport), or railway lines, the running surface of a railway
Rail profile, the cross sectional shape of a railway rail
Third rail (or conductor rail), a method of providing electric power to a railway train

Picatinny rail, a bracket used on some firearms in order to provide a standardized mounting platform for telescopic sights and other accessories
Rails or Rallidae, a family of birds which includes crakes, coots, and gallinules
Structural
- Guard rail, for protective separation of persons (including those in vehicles) from dangerous places or situations
- Hand rail, for physical support, such as on stairways and steps
- Theatre rail, see batten (theater), from which lighting fixtures, theatrical scenery, tabs or curtains may be hung
- Curtain rail, see curtain, from which curtains are hung
- Door rails, see frame and panel, a horizontal outside member on a door or in a frame and panel construction
Electrical engineering
- Power supply rail or voltage rail, a single voltage provided by a power supply unit
Computer Science
- Ruby on Rails, often simply Rails, is an open source web application framework which runs via the Ruby programming language