from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A distance between the rails of a railroad track that is less than the standard width of 56.5 inches (143.5 centimeters).
  • noun A locomotive, car, or railway line of this gauge.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A railway gauge (distance between the two lines) that is less than the standard gauge (often quoted as 56 inches)

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a railroad track (or its width) narrower than the standard 56.5 inches


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