Source : Webster's Revised Unabridged Dictionary (1913)

Congregate \Con"gre*gate\, a. [L. congregatus, p. p. of
   congregare to congregate; on- + gregare to collect into a
   flock, fr. grex flock, herd. See {Gregarious}.]
   Collected; compact; close. [R.] --Bacon.

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.

Congregate \Con"gre*gate\, v. i.
   To come together; to assemble; to meet.

         Even there where merchants most do congregate. --Shak.

Source : WordNet®

congregate
     adj : brought together into a group or crowd; "the accumulated
           letters in my office" [syn: {accumulated}, {amassed}, {assembled},
            {collected}, {massed}]
     v : come together, usually for a purpose; "The crowds
         congregated in front of the Vatican on Christmas Eve"