train mile (plural train miles)

  1. (rail transport) A unit used in estimating railway running expenses, etc.: the total number of miles run by all the trains of a railroad, or system of railroads, as within a given time, or for a given expenditure.



Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for train mile in
Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.)