signboard
noun [ C ] uk/ˈsaɪn.bɔːd/ us/ˈsaɪn.bɔːrd/
广告牌，布告牌;（写着机构名称的）招牌
a sign with information on it or showing the name of a business, school, hospital, etc.
A signboard by the entrance proclaimed that the business had been established in 1852. 入口处的一块招牌上写着这家公司成立于1852年。