energy level
Americannoun
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a comparative level of capacity for vigorous activity.
The child has a high energy level.
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Also called energy state. Physics. one of a quantized series of states in which matter may exist, each having constant energy and separated from others in the series by finite quantities of energy.
noun
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a constant value of energy in the distribution of energies among a number of atomic particles
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the energy of a quantum state of a system. The terms energy level and energy state are often used loosely to mean quantum state . This is avoided in precise communication
Etymology
Origin of energy level
First recorded in 1905–10
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 Fermi level represents the highest energy level electrons can occupy in a solid at absolute zero.
From Science Daily ● Dec. 21, 2025
UCLA’s energy level in practice has vacillated wildly the last few weeks, with seemingly little correlation to results.
From Los Angeles Times ● Oct. 3, 2024
“It will definitely ramp up the energy level for Trump supporters,” he said.
From Slate ● Jul. 16, 2024
First, WS2 absorbs light by sending an electron to a higher energy level.
From Science Daily ● May 30, 2024
Martin apparently did not appreciate Cade Hernandez’s energy level.
From "100 Sideways Miles" by Andrew Smith
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.
