bill·board
                    
                                                                                                              
                                                                                                                                  ˈbil-ˌbȯrd  
                                                      
                                                          
            
                                
              
          
                                                      : a flat surface (as of a panel, wall, or fence) on which bills are posted                                      
                
                                
            specifically                
          
                                                      : a large panel designed to carry outdoor advertising                                      
            
            
            
              billboarded; billboarding; billboards            
        
    
                                
              
          
                                                      : to promote by a conspicuous display on or as if on a billboard                                      
                
                    
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  Merriam-Webster unabridged




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