- A mass of something piled up or collected.
- (finance) The action of investors buying an asset from other investors when the price of the asset is low.
- The process of growing into a heap or a large amount.
"an accumulation of earth, of sand, of evils, of wealth, or of honors"
- (accounting) The continuous growth of capital by retention of interest or savings.
- The act of amassing or gathering, as into a pile.
- (law) The concurrence of several titles to the same proof.