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excited state

noun

Physics.
  1. any of the energy levels of a physical system, especially an atom, molecule, etc., that has higher energy than the lowest energy level.

excited state

  1. A state of a physical system in which the system has more than the minimum possible potential energy. Excited states tend to be unstable and easily or spontaneously revert to lower energy states, giving off energy.
  2. Compare ground state
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Word History and Origins

Origin of excited state1

First recorded in 1925–30
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