billboard [billboards](large advertisement along side of highway) noun [UK: ˈbɪl.bɔːd] [US: ˈbɪl.ˌbɔːrd] sign [signs](flat object bearing a message) noun [UK: saɪn] [US: ˈsaɪn] signboard [signboards](a board carrying a sign) noun [UK: ˈsaɪn.bɔːd] [US: ˈsaɪn.bɔːrd] |