energy level

noun

: one of the stable states of constant energy that may be assumed by a physical system
used especially of the quantum states of electrons in atoms and of nuclei

called also energy state

Examples of energy level in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Including an apple as part of a balanced meal or as a snack can support steady energy levels. Sherri Gordon, Health, 14 Oct. 2025 The start can feel close to peak energy levels of the follicular phase but as progesterone levels increase, some people begin to feel fatigued. Megan Feringa, New York Times, 10 Oct. 2025 The research also revealed that energy levels matter. Neetika Walter, Interesting Engineering, 10 Oct. 2025 Indeed, this superconducting electronic circuit does have quantized energy levels, only emitting or absorbing energy in specific quantities. Ethan Siegel, Big Think, 8 Oct. 2025 See All Example Sentences for energy level

Word History

First Known Use

1902, in the meaning defined above

Time Traveler
The first known use of energy level was in 1902

Cite this Entry

“Energy level.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/energy%20level. Accessed 16 Oct. 2025.

Kids Definition

energy level

noun
: one of the stable states of constant energy that may be assumed by a physical system
used especially of the states of electrons in atoms

More from Merriam-Webster on energy level

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