landslide

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. The downward sliding of a relatively dry mass of earth and rock.
2. n. The mass that slides. Also called landslip.
3. n. An overwhelming majority of votes for a political party or candidate.
4. n. An election that sweeps a party or candidate into office.
5. n. A great victory.

Century Dictionary and Cyclopedia

1. n. A falling or sliding down of a mass of soil, detritus, or rock on a mountain-side. The less destructive land-slides occur when gravel, sand, and other detrital material resting on a slope become so permeated with water that they can no longer resist the action of gravity. The more destructive land-slides are generally due to the slipping of a part of the solid rock of the mountain, in consequence of the softening of some more permeable layer in a mass of which the strata have a suitable inclination. Some such land-slides have been appalling in their results: as, for instance, that which took place at Plurs, north of Lake Como, in 1618, by which many persons perished, and stately buildings were buried to a depth of 100 feet or more. The falling of part of the eminence called Cape Diamond in Quebec in 1889 destroyed many buildings and many lives. The word land-slip is occasionally used for land-slide, as also the term rock-avalanche. Also called earth-fall.

Wiktionary

1. n. A natural disaster that involves the breakup and downhill flow of rock, mud, water and anything caught in the path.
2. n. A vote won by a wide or overwhelming majority.

GNU Webster's 1913

1. n. The slipping down of a mass of land from a mountain, hill, etc.
2. n. The land which slips down.
3. n. An election victory in which the winning candidate receives a substantial majority of the votes, usually meaning at least ten per cent more than any opposing candidate.
4. n. Any overwhelming victory.

WordNet 3.0

1. n. an overwhelming electoral victory
2. n. a slide of a large mass of dirt and rock down a mountain or cliff