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Date: 1600-1700
Language: Latin
Origin: aequilibrium, from aequi- ( EQUI-) + libra 'weight, balance'

equilibrium

noun
     
e‧qui‧lib‧ri‧um [singular, uncountable]
1 a balance between different people, groups, or forces that compete with each other, so that none is stronger than the others and a situation is not likely to change suddenly:
The government is anxious not to upset the economic equilibrium.
2 a state in which you are calm and not angry or upset:
She struggled to recover her equilibrium.

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