thermal equilibrium
Americannoun
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the relationship between two systems connected only by a diathermic wall.
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the relationship between two isolated systems the states of which are such that no net transfer of energy would occur between them if they were connected by a diathermic wall.
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The condition under which two substances in physical contact with each other exchange no heat energy. Two substances in thermal equilibrium are said to be at the same temperature.
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See also thermodynamics
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The USC researchers realized that light in these nonlinear environments behaves much like a gas moving toward thermal equilibrium, where random collisions eventually create a stable distribution of energy.
From Science Daily ● Oct. 10, 2025
Nandkishore explained that almost everything in the universe, from cups of coffee to vast oceans, tends to move toward what scientists call "thermal equilibrium."
From Science Daily ● Jan. 24, 2024
That’s because the spread of energies available is reduced when there’s thermal equilibrium.
From Salon ● Oct. 25, 2023
The universe began in a "wound-up" state far from thermal equilibrium.
From Scientific American ● May 26, 2019
If this disturbed the thermal equilibrium, we could construct cyclic processes to take advantage of the resulting flow of heat to do mechanical work, and such processes might be carried on without limit.
From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" by Various
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.