Definition of "energy level" []

• The energy characteristic of a stationary state of a physical system, especially a quantum mechanical system. (noun)
• The stationary state of a quantum mechanical system. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Montez had used the word campus, and strangely enough, the academic analogy seemed superficially fitting—wide, bright corridors teeming with young people and bustling with activity, the energy level reminiscent of a university during registration week."
• "Increase your energy level and make your lunchtime or any break time active."
• "Her energy level continued to soar, making her fifty-hour workweek much easier and more enjoyable."