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What does energy level mean?

Looking for the meaning or definition of the word energy level? Here's what it means.

Noun
  1. Used other than with a figurative or idiomatic meaning: see energy,‎ level.
  2. (physics) any of the discrete stable energies that a quantum mechanical system (such as the electrons of an atom) can have
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Examples
An electric field emanating from the charged red atom causes energy level shifts in the molecule, allowing current to flow.
This means that an atom with eight electrons in its outermost energy level is very stable.
When an electron falls from a higher energy level to a lower energy level, a photon is given off.
Have them wait 30 seconds or so, and then ask them to rate their energy level once again by marking the scale.
First up were alt-rockers Take the Day, a five-piece from Milwaukee who dialed up the energy level on their set.
Research the breeds to find the one with the right size, energy level, trainability and temperament for your lifestyle.

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