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 can support more stable energy levels. Mira Miller, Verywell Health, 15 May 2026 What That Spike Feels Like in Your Body This quick bump and dip in blood sugar translates to a surge in energy levels with an equally noticeable crash soon after. Christina Manian, Health, 14 May 2026 This blend is designed to encourage the metabolism and the energy level of a medium-sized dog. Bestreviews, Mercury News, 14 May 2026 This setup would let researchers detect minute differences in the isotopes’ energy levels by examining nuances in the magnetic field created by each particle’s spinning nucleus, called the nuclear magnetic moment. K. R. Callaway, Scientific American, 13 May 2026 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 20 May. 2026.

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

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