E`qui*lib"ri*um (?), n.; pl. E. Equilibriums (#), L. Equilibria (#). [L. aequilibrium, fr. aequilibris in equilibrium, level; aequus equal + libra balance. See Equal, and Librate.] 1. Equality of weight or force; an equipoise or a state of rest produced by the mutual counteraction of two or more forces.

2. A level position; a just poise or balance in respect to an object, so that it remains firm; equipoise; as, to preserve the equilibrium of the body.

Health consists in the equilibrium between those two powers.

3. A balancing of the mind between motives or reasons, with consequent indecision and doubt.

• The condition of a system in which competing influences are balanced.
  
• Poise; mental or physical balance.
  
• (chemistry) The state of a reaction in which the rates of the forward and reverse reactions are the same.
  
• (physics) The state of a body at rest or in uniform motion in which the resultant of all forces on it is zero.
  

German
• balance, equilibrium