a stable situation in which forces cancel one another

a lack of balance or state of disequilibrium

hold or carry in equilibrium

bring into balance or equilibrium

be in equilibrium

a balance between and interplay of opposing elements or tendencies (especially in art or literature)

an equilibrium between the amounts of electrolytes (as calcium and sodium and potassium) that is essential for normal health and functioning

the balance between the amount of nitrogen taken in (to the soil or the body) and the amount given off (lost or excreted)

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 rates of reaction in both directions are equal).