Definitions
1.nounA large mass or body of snow and ice sliding swiftly down a mountain side, or falling down a precipice.
2.nounA fall of earth, rocks, etc., similar to that of an avalanche of snow or ice.
3.noun(by extension) A sudden, great, or irresistible descent or influx; anything like an avalanche in suddenness and overwhelming quantity.
4.verbTo descend like an avalanche.
5.verbTo come down upon; to overwhelm."The shelf broke and the boxes avalanched the workers."
6.verbTo propel downward like an avalanche.