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
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This more stable blood sugar pattern can also help support better energy levels and satiety. Lauren Panoff, Verywell Health, 9 Dec. 2025 In space, this makes the life of an astronaut a bit easier by reducing the need to manage menstruation with menstrual products — and potentially even limiting side effects of natural hormonal fluctuations such as cramping or low energy levels. Jessica Rendall, Space.com, 7 Dec. 2025 Rich in iodine, seaweed supports healthy thyroid function, which plays a key role in regulating your metabolism and energy levels, both of which can impact your sleep-wake cycle. Lauren Manaker, SELF, 26 Nov. 2025 With low energy levels and breathing challenges due to their brachycephalic structure, English bulldogs tend to tire easily. Liz O'Connell, MSNBC Newsweek, 25 Nov. 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 12 Dec. 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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