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.
In 2023, scientists detected a subatomic particle called a neutrino hitting Earth with an energy level so extreme it seemed impossible.
From Science Daily ● Apr. 8, 2026
The Fermi level represents the highest energy level electrons can occupy in a solid at absolute zero.
From Science Daily ● Dec. 21, 2025
Bringing the energy level to its peak, the unexpected duo brought the “once in a lifetime” feeling to the 25th anniversary.
From Los Angeles Times ● Nov. 15, 2024
“It will definitely ramp up the energy level for Trump supporters,” he said.
From Slate ● Jul. 16, 2024
Martin apparently did not appreciate Cade Hernandez’s energy level.
From "100 Sideways Miles" by Andrew Smith
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
