[equi.lib.ri.um] n, pl -ri.ums or -ria [L aequilibrium, fr. aequilibris being in equilibrium, fr. aequi- + libra weight, balance] (1608) 1 a: a state of intellectual or emotional balance: poise b: a state of adjustment between opposing or divergent influences or elements
2: a state of balance between opposing forces or actions that is either static (as in a body acted on by forces whose resultant is zero) or dynamic (as in a reversible chemical reaction when the velocities in both directions are equal)
3: balance 6a