in·e·qual·i·ty 
(ĭn′ĭ-kwŏlĭ-tē)
(ĭn′ĭ-kwŏlĭ-tē)n. pl. in·e·qual·i·ties
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 apparent motion of a celestial body.