conservation of energy

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.

noun

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

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

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Word History and Origins

Origin of conservation of energy¹

First recorded in 1850–55

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Example Sentences

Examples have not been reviewed.

“There’s no conservation of energy on that end of the floor. He’s played elite defense now for a while.”

From

No. There’s no conservation of energy on that end of the floor.

From

It was my favorite episode, the one about the law of conservation of energy.

From

This in turn has some important implications for the conservation of energy and momentum.

From

Energy Department officials said it has tentatively found that the changes are “economically justified and would result in a significant conservation of energy.”

From

conservation of charge conservation of lepton number

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