Definition of "thermodynamic"

thermodynamic

/ˌθɝmoʊdaɪˈnæmɪk/

adjective
not comparable
1. Of, or relating to the conversion of heat into other forms of energy.
  Quotations
  The locomotive is designed to give a high and sustained tractive effort at moderate speed on steep gradients. To attain this result, M. Chapelon, in experiments dsting back to 1940, aimed at improving the thermodynamic efficiency.
  1949 November and December, “Motive Power Developments in France”, in Railway Magazine, page 400
2. (physics) Of, or relating to thermodynamics.