'Standard gauge' definitions:

Definition of 'standard gauge'

(from WordNet)
noun
Railroad track having the standard width of 56.5 inches

Definition of 'Standard gauge'

From: GCIDE
  • Standard \Stand"ard\, a.
  • 1. Being, affording, or according with, a standard for comparison and judgment; as, standard time; standard weights and measures; a standard authority as to nautical terms; standard gold or silver. [1913 Webster]
  • 2. Hence: Having a recognized and permanent value; as, standard works in history; standard authors. [1913 Webster]
  • 3. (Hort.) (a) Not supported by, or fastened to, a wall; as, standard fruit trees. (b) Not of the dwarf kind; as, a standard pear tree. [1913 Webster]
  • Standard candle, Standard gauge. See under Candle, and Gauge.
  • Standard solution. (Chem.) See Standardized solution, under Solution. [1913 Webster]