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conservation of energy

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noun Physics.

the principle that in a system that does not undergo any force from outside the system, the amount of energy is constant, irrespective of its changes in form.

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Also called law of conservation of energy.

Origin of conservation of energy

First recorded in 1850–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use conservation of energy in a sentence

British Dictionary definitions for conservation of energy

conservation of energy

noun

the principle that the total energy of any isolated system is constant and independent of any changes occurring within the system
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

Scientific definitions for conservation of energy

conservation of energy

A principle stating that the total energy of a closed system remains constant over time, regardless of other possible changes within the system. It is related to the symmetry of time invariance. See also invariance thermodynamics.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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