noun pl. inequalities -·ties

1. the quality of being unequal; lack of equality
2. an instance of lack of equality; specif.,
   1. a difference or variation in size, amount, rank, quality, social position, etc.
   2. an unevenness in surface; lack of levelness
   3. a lack of proper proportion; unequal distribution
3. Math. the relation between two unequal quantities, or an expression of this relationship: Ex.: a ≠ b (a is not equal to b), 3a > 2b (3a is greater than 2b)

Etymology: ME inequalitie < MFr inequalité < L inaequalitas