heat engine


Definition of heat engine 

: a mechanism (such as an internal combustion engine) for converting heat energy into mechanical or electrical energy

Examples of heat engine in a Sentence

Recent Examples on the Web

The source of the problem lies in how all heat engines work. Chris Lee, Ars Technica, "Pulsed engines provide high efficiency, output power, low fluctuations," 25 Sep. 2018 Required by the second law of thermodynamics, that unavoidable waste of energy severely limits the efficiency of a heat engine to below a level set by the temperatures of the baths. Adrian Cho, Science | AAAS, "Quantum measurements could power a tiny, hyper-efficient engine," 10 July 2018 The site broke a decades-old record Sunday by surpassing a cumulative 12.5 years of operation of a heat engine. Grant Segall, cleveland.com, "NASA Glenn shares successful demonstration of nuclear power for space (photos)," 2 May 2018 At its core, the drinking bird is a heat engine, not that unlike a steam turbine or diesel engine. Eric Limer, Popular Mechanics, "An Absurdly Detailed Explanation of the Drinking Bird Toy," 30 Jan. 2018 These planetary heat engines sprout from relatively weak clusters of thunderstorms — waves of low pressure from the coast of Africa — and fester in the warm waters of the Atlantic. Angela Fritz, Washington Post, "Harvey. Irma. Maria. Why is this hurricane season so bad?," 23 Sep. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'heat engine.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of heat engine

circa 1895, in the meaning defined above

Keep scrolling for more

Learn More about heat engine

Share heat engine

Dictionary Entries near heat engine

heat devil


heated term

heat engine

heat equator


heater car

Statistics for heat engine

Last Updated

24 Nov 2018

Look-up Popularity

Time Traveler for heat engine

The first known use of heat engine was circa 1895

See more words from the same year

More from Merriam-Webster on heat engine

Britannica.com: Encyclopedia article about heat engine

Comments on heat engine

What made you want to look up heat engine? Please tell us where you read or heard it (including the quote, if possible).


living or existing for a long time

Get Word of the Day daily email!

Test Your Vocabulary

Late Autumn 2018 Words of the Day Quiz

  • frosted-autumn-leaves
  • Which is a synonym of yahoo?
Spell It

Can you spell these 10 commonly misspelled words?

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!