What does the word rail mean?

Usage examples for rail

  1. Coal being carried by rail. – The Secrets of the German War Office by Dr. Armgaard Karl Graves
  2. But he buried his chin deep in his hands and sat staring long without speaking, across the slowly rising and falling rail, at the sea. – The Heart of Arethusa by Francis Barton Fox
  3. Had his chum come down over the rail for it? – Duffels by Edward Eggleston
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