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.]


Equality of weight or force; an equipoise or a state of rest produced by the mutual counteraction of two or more forces.


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. Arbuthnot.


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

Equilibrium valve Steam Engine, a balanced valve. See under Valve.


© Webster 1913.