From Longman Dictionary of Contemporary Englishsignboardsign‧board /ˈsaɪnbɔːd $ -bɔːrd/ noun [countable] a flat piece of wood, cardboard etc in a public place, with writing on it that gives people information
Examples from the Corpus
signboard• Flights to each place were listed on a signboard above the ticket window.• It towered over the railway line and the makeshift station, a platform without a signboard.• A signboard, by the entrance, proclaimed that the business had been established in 1852.• A blue and red hand-painted signboard is hung over the entrance and a garland of marigolds placed around it.• Then I found it, a narrow split in the forest with a white-painted signboard, partly covered by an overhanging bush.• Now, the windows were whitewashed over, and the signboards over them were weathered illegible.• By the 1990s, the Rumbaughs had a chimp named Kanzi requesting treats and even asking to play games by using signboards. 