Source : Webster's Revised Unabridged Dictionary (1913)

Coalesce \Co`a*lesce"\, v. i. [imp. & p. p. {Coalesced}; p. pr.
   & vb. n. {Coalescing}.] [L. coalescere, coalitium; co- +
   alescere to grow up, incho. fr. alere to nourish. See
   {Aliment}, n.]
   1. To grow together; to unite by growth into one body; as,
      the parts separated by a wound coalesce.

   2. To unite in one body or product; to combine into one body
      or community; as, vapors coalesce.

            The Jews were incapable of coalescing with other
            nations.                              --Campbell.

            Certain combinations of ideas that, once coalescing,
            could not be shaken loose.            --De Quincey.

   Syn: See {Add}.

Source : WordNet®

coalesce
     v 1: mix together different elements; "The colors blend well"
          [syn: {blend}, {flux}, {mix}, {conflate}, {commingle}, {immix},
           {fuse}, {meld}, {combine}, {merge}]
     2: fuse or cause to grow together