"ground state." YourDictionary, n.d. Web. 14 January 2019. <https://www.yourdictionary.com/ground-state>.
ground state. (n.d.). Retrieved January 14th, 2019, from https://www.yourdictionary.com/ground-state
The state of a physical system having the lowest possible potential energy. For example, an electron in the lowest energy orbital in a hydrogen atom is in a ground state. The ground state of a physical system tends to be stable unless energy is applied to it from the outside; states that are not the ground state have a tendency to revert to the ground state, giving off energy in the process.