energy level

[ en-er-jee lev-uhl ]

noun

1. a comparative level of capacity for vigorous activity:

   The child has a high energy level.

2. Also called energy state. Physics. one of a quantized series of states in which matter may exist, each having constant energy and separated from others in the series by finite quantities of energy.

energy level

noun

1. a constant value of energy in the distribution of energies among a number of atomic particles
2. the energy of a quantum state of a system. The terms energy level and energy state are often used loosely to mean quantum state . This is avoided in precise communication

Word History and Origins

Origin of energy level¹

First recorded in 1905–10

Example Sentences

Bringing the energy level to its peak, the unexpected duo brought the “once in a lifetime” feeling to the 25th anniversary.

From Los Angeles Times

Weekend tickets mean you can arrive under your own steam by train or car - although beware Glastonbury's legendary tailbacks, and how depleted your energy levels might be on the way home.

From BBC

He's got pace, as well as a physical presence, plus he is composed on the ball and his energy levels mean he can press as well.

From BBC

UCLA’s energy level in practice has vacillated wildly the last few weeks, with seemingly little correlation to results.

From Los Angeles Times

Herbert’s return has brought a noticeable shift in mood, the lift in energy level nearly tangible.

From Los Angeles Times