Entry 1 sense Webster, 1913 Thermodynamic /thẽrmˌ-ōd-īnˌ-ăm'-ĭk/ · Ther·mo·dy·nam·ic · IPA /ˌθɝmoʊdaɪˈnæmɪk/ 01 a. Relating to thermodynamics; caused or operated by force due to the application of heat. 1. Relating to thermodynamics; caused or operated by force due to the application of heat.(Physics) Phrases & compounds Thermodynamic function — See Heat weight, under Heat.