Source : Webster's Revised Unabridged Dictionary (1913)

Inequality \In`e*qual"i*ty\, n.; pl. {Inequalities}. [L.
   inaequalitas.]
   1. 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.

            There is so great an inequality in the length of our
            legs and arms as makes it impossible for us to walk
            on all four.                          --Ray.

            Notwithstanding which inequality of number, it was
            resolved in a council of war to fight the Dutch
            fleet.                                --Ludlow.

            Sympathy is rarely strong where there is a great
            inequality of condition.              --Macaulay.

   2. 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.

            The country is cut into so many hills and
            inequalities as renders it defensible. --Addison.

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

            Inequality of air is ever an enemy to health.
                                                  --Bacon.

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

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

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