What is the meaning of Equilibrium?

The condition of a system in which competing influences are balanced, resulting in no net change.

Mental balance.

The state of a reaction in which the rates of the forward and reverse reactions are the same.

The state of a body at rest or in uniform motion in which the resultant of all forces on it is zero.

1 2 equilibrium” listed in the Oxford English Dictionary [2 Ed.]

Source: wiktionary.org