energy level

/ˌɛnərdʒi ˌlɛvəl/
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Other forms: energy levels

Definitions of energy level
  1. noun
    a definite stable energy that a physical system can have; used especially of the state of electrons in atoms or molecules
    “according to quantum theory only certain energy levels are possible”
    synonyms: energy state
    see moresee less
    type of:
    energy, free energy
    (physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs
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