n. Lack of equality in character or attributes; unlikeness between things of the same kind; diversity; disparity: as, inequality in size, numbers, etc.; the inequality of the fingers.n. Lack of equality in the state or condition of a person or thing; want of uniformity of relation, level, surface, etc.; variation or variable ness; unevenness: as, inequalities of temper; inequalities of rank or fortune; inequalities of the earth's surface.n. Injustice; partiality.n. In astronomy, the deviation in the motion of a planet or satellite from its uniform mean mo tion.n. In algebra, an expression of two unequal quantities connected by either of the signs of inequality ⟩ or ⟨; thus, a ⟩ b, signifying that a is greater than b, and a ⟨ b, signifying that a is less than b, are inequalities.