noun

1. The act of amassing or gathering, as into a pile.

2. The process of growing into a heap or a large amount.

   "an accumulation of earth, of sand, of evils, of wealth, or of honors"

3. A mass of something piled up or collected.

4. The concurrence of several titles to the same proof.

5. The continuous growth of capital by retention of interest or savings.

6. The action of investors buying an asset from other investors when the price of the asset is low.

7. The practice of taking two higher degrees simultaneously, to reduce the length of study.