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.
Bipolar disorder is a manic-depressive illness of the brain that causes extreme changes in mood and energy levels, according to the National Institute of Mental Health. Vanessa Etienne, PEOPLE, 21 Oct. 2025 When your body has enough B12, this process works more efficiently, which can increase your energy levels and motivation to be active. Lindsay Curtis, Health, 21 Oct. 2025 What’s more, healthy doses of B vitamins, plus vitamin B-12, are featured too for improved energy levels, skin, and nail health. Kiana Murden, Vogue, 17 Oct. 2025 Each laser beam precisely matches the quantum energy levels of rubidium atoms. Aamir Khollam, Interesting Engineering, 16 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 22 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

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!