landslide  
noun [ C ] uk/ˈlænd.slaɪd/ us/ˈlænd.slaɪd/
  (FALLING EARTH)     
  (also landslip)山体滑坡,塌方 
a mass of rock and earth moving suddenly and quickly down a steep slope
   (VICTORY)      
 (选举中)一方选票占压倒性多数,大胜
the winning of an election with an extremely large number of votes
  The opinion polls are predicting a landslide for the Republicans in next week's election. 民意调查预测共和党将在下周的选举中大获全胜。 
 a landslide victory 压倒性胜利