Source : Webster's Revised Unabridged Dictionary (1913)

Agglomeration \Ag*glom`er*a"tion\, n. [Cf. F. agglom['e]ration.]
   1. The act or process of collecting in a mass; a heaping
      together.

            An excessive agglomeration of turrets. --Warton.

   2. State of being collected in a mass; a mass; cluster.

Source : WordNet®

agglomeration
     n 1: a jumbled collection or mass
     2: the act of collecting in a mass; the act of agglomerating