ac•cu•mu•latePronunciation: (u-kyOO'myu-lāt"), [key]
—v., -lat•ed, -lat•ing.
to gather or collect, often in gradual degrees; heap up: to accumulate wealth.
to gather into a heap, mass, cover, etc.; form a steadily increasing quantity: Snow accumulated in the driveway. His debts kept on accumulating.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.