(n) :
a large mass or body of snow and ice sliding swiftly down a mountain side, or falling down a precipice; a fall of earth, rocks, etc., similar to that of an avalanche of snow or ice
(n) :
a large mass or body of snow and ice sliding swiftly down a mountain side, or falling down a precipice; a fall of earth, rocks, etc., similar to that of an avalanche of snow or ice