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.
The shift to shorter days can negatively affect mood and energy levels, too. Katia Hetter, CNN Money, 3 Nov. 2025 Consuming caffeine—including coffee—around 60 minutes before a workout can improve performance and energy levels. Health Editorial Team, Health, 1 Nov. 2025 While this energy level is lower than many rifle categories, the slug’s massive frontal area and weight create uniquely destructive terminal effects. Atharva Gosavi, Interesting Engineering, 30 Oct. 2025 What does this have to do with introverts and our energy levels? Big Think, 28 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 8 Nov. 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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