inequality

(ĭnˌĭ-kwŏlˈĭ-tē)

1. a. The condition of being unequal.
   b. An instance of being unequal.
2. a. Lack of equality, as of opportunity, treatment, or status.
   b. Social or economic disparity: the growing inequality between rich and poor.
3. Lack of smoothness or regularity; unevenness.
4. Variability; changeability.
5. Mathematics An algebraic relation showing that a quantity is greater than or less than another quantity.
6. Astronomy A deviation from uniformity in the motion of a celestial body.