hoarding  
noun [ C ] UK uk/ˈhɔː.dɪŋ/ us/ˈhɔːr.dɪŋ/
  (ADVERTISEMENT)      
  (US billboard)(尤指路旁的)大型广告牌 
a very large board on which advertisements are shown, especially at the side of a road
  an advertising hoarding 大幅广告牌 
   (FENCE)     
 (尤指建筑工地周围的)临时围栏
a temporary fence, usually made of boards, put around an area, especially one where people are building