Definitions for "Excited state"
Compare with ground state. An atom or molecule which has absorbed energy is said to be in an excited state. Excited states tend to have short lifetimes; they lose energy either through collisions or by emitting photons to "relax" back down to their ground states.
condition of a charged phosphor before emission
This is a state where one or more electrons have been promoted from orbitals higher than those they occupy in the ground state.