Source : Webster's Revised Unabridged Dictionary (1913)

Divider \Di*vid"er\, n.
   1. One who, or that which, divides; that which separates
      anything into parts.

   2. One who deals out to each his share.

            Who made me a judge or a divider over you? --Luke
                                                  xii. 14.

   3. One who, or that which, causes division.

            Hate is of all things the mightiest divider.
                                                  --Milton.

            Money, the great divider of the world. --Swift.

   4. pl. An instrument for dividing lines, describing circles,
      etc., compasses. See {Compasses}.

   Note: The word dividers is usually applied to the instrument
         as made for the use of draughtsmen, etc.; compasses to
         the coarser instrument used by carpenters.

Source : WordNet®

divider
     n 1: a taxonomist who classifies organisms into many groups on
          the basis of relatively minor characteristics [syn: {splitter}]
          [ant: {lumper}]
     2: a person who separates something into parts or groups
     3: a vertical structure that divides or separates (as a wall
        divides one room from another) [syn: {partition}]