Inequality

The quality of being unequal; difference, or want of equality, in any respect; lack of uniformity; disproportion; unevenness; disparity; diversity; as, an inequality in size, stature, numbers, power, distances, motions, rank, property, etc.

Unevenness; want of levelness; the alternate rising and falling of a surface; as, the inequalities of the surface of the earth, or of a marble slab, etc.

Variableness; changeableness; inconstancy; lack of smoothness or equability; deviation; unsteadiness, as of the weather, feelings, etc.

Disproportion to any office or purpose; inadequacy; competency; as, the inequality of terrestrial things to the wants of a rational soul.

An expression consisting of two unequal quantities, with the sign of inequality (< or >) between them; as, the inequality 2 < 3, or 4 > 1.

An irregularity, or a deviation, in the motion of a planet or satellite from its uniform mean motion; the amount of such deviation.

A relation between two expressions that may not be equal

lack of equality; "the growing inequality between rich and poor"