Standard gauge

from WordNet (r) 3.0 (2006)
standard gauge
    n 1: railroad track having the standard width of 56.5 inches
    
from The Collaborative International Dictionary of English v.0.48
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]
    

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