noun

• (electronics) A conductor maintained at a fixed electrical potential relative to ground, to which other circuit components are connected.
  "ISA devices draw power from the +5 V, −5 V, +12 V, and −12 V rails of the power supply unit."
• (surfing) One of the lengthwise edges of a surfboard.
  "Rails alone can only ever have a marginal effect on a board's general turning ability."
• (Internet) A vertical section on one side of a web page.
  "We're experimenting with ads in the right-hand rail."
• (drugs) A large line (portion or serving of a powdery illegal drug).
  "Do a couple rails and chase your own tail"

verb

• (intransitive) To travel by railway.
  "Mottram of the Indian Survey had ridden thirty and railed one hundred miles from his lonely post in the desert […]"
• (transitive, rail transport, of rolling stock) To place on a track.
• (transitive) To enclose with rails or a railing.
  "It ought to be fenced in and railed."
• (transitive) To range in a line.
  "They were brought to London all railed in ropes, like a team of horses in a cart."

noun

• (obsolete) An item of clothing; a cloak or other garment; a dress.
• (obsolete) Specifically, a woman's headscarf or neckerchief.
  "A course hempen raile about her shoulders."

verb

• (obsolete, of a liquid) To gush; to flow.
  "his breste and his brayle was bloodé – and hit rayled all over the see."
• (obsolete, of wind) To blow.