Source : Webster's Revised Unabridged Dictionary (1913)

Accumulation \Ac*cu`mu*la"tion\, n. [L. accumulatio; cf. F.
   accumulation.]
   1. The act of accumulating, the state of being accumulated,
      or that which is accumulated; as, an accumulation of
      earth, of sand, of evils, of wealth, of honors.

   2. (Law) The concurrence of several titles to the same proof.

   {Accumulation of energy} or {power}, the storing of energy by
      means of weights lifted or masses put in motion;
      electricity stored.

   {An accumulation of degrees} (Eng. Univ.), the taking of
      several together, or at smaller intervals than usual or
      than is allowed by the rules.