1. Tonne-kilometer, a unit of measure used in freight transport to determine the transport of one tonne of goods over one kilometer
   "A transport of 1250 kilograms over 90 kilometers equals 112,5 tonne-kilometers";
   - tonne-kilometre [Brit, Cdn], tkm

Derived forms: tonne-kilometers

Type of: unit, unit of measurement

Encyclopedia: Tonne-kilometer