the downward falling or sliding of a mass of soil, detritus, or rock on or from a steep slope.

the mass itself.

an election in which a particular victorious candidate or party receives an overwhelming mass or majority of votes

the 1936 landslide for Roosevelt.

any overwhelming victory

She won the contest by a landslide.

to come down in or as in a landslide.

to win an election by an overwhelming majority.

noun

avalanche , earthfall , mudslide , rockslide , snowslidenotes:avalanche means literally \'a gulp , something swallowed\' from french avaler \'to swallow\' and italian lava \'torrent\' and refers to snow , rocks , or other debris coming down a mountainside - whereas a landslide is an entire mountainside coming down , advantage , clean sweep , conquest , defeat , grand slam , killing * , overthrow , superiority , sweep , triumph , winnotes:avalanche means literally \'a gulp , lopsided , victory , win