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

The first season—the menstrual phase, known as inner winter—refers to the days of bleeding when hormone levels, such as estrogen and progesterone, are low and symptoms may include cramping, bloating, low energy levels, headaches skin blemishes and mood changes. —Hatty Willmoth, MSNBC Newsweek, 19 May 2025

Walking 10,000 steps—about 4 or 5 miles—daily can strengthen bones and muscles, aid in weight loss, increase energy levels, and improve heart and lung health. —Jennifer Steinhoff, Verywell Health, 14 May 2025

Monitor your energy levels: Schedule your most demanding tasks when your energy typically peaks. —Caroline Castrillon, Forbes.com, 13 May 2025

After major heart surgery at 85, her appetite and energy level waned. —Barbara Ellis, Denver Post, 11 May 2025

Word History

First Known Use

1902, in the meaning defined above

Rhymes for energy level

• mediaeval
• bevel
• devil
• daredevil
• sublevel
• multilevel

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