Source : Webster's Revised Unabridged Dictionary (1913)

Congregate \Con"gre*gate\, v. t. [imp. & p. p. {Congregated}; p.
   pr. & vb. n. {Congregating}]
   To collect into an assembly or assemblage; to assemble; to
   bring into one place, or into a united body; to gather
   together; to mass; to compact.

         Any multitude of Christian men congregated may be
         termed by the name of a church.          --Hooker.

         Cold congregates all bodies.             --Coleridge.

         The great receptacle Of congregated waters he called
         Seas.                                    --Milton.

Source : WordNet®

congregating
     n : the act of congregating [syn: {congregation}]