heat engine

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noun Thermodynamics.

a mechanical device designed to transform part of the heat entering it into work.

Origin of heat engine

First recorded in 1890–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for heat engine

heat engine

noun

an engine that converts heat energy into mechanical energy

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012