a state of balance between opposing forces, actions, or processes, e.g. in a reversible chemical reaction
a state of bodily or physical balance adjustment between opposing or divergent influences or elements
The introduction of a new and mighty force had disturbed the old equilibrium — Macaulay
a calm and controlled state of intellectual or emotional state balance
the economic condition in which supply and demand are matched
the normal state of the body in relation to its environment that involves adjustment to changing orientation with respect to gravity
[Latin aequilibrium from aequilibris being in equilibrium, from aequi- equi- + libra weight, balance]