sign,标语牌，牌。

Can you see the sign of my store.你看到我店铺的牌子吗？
The sign says"Parking forbidden" 告示牌上写着"禁止停车"。

sign也有手势的意思，
I talked with him by signs. 我和他用手势交谈。
sign还可做动词表示签名。
He signed his name on the cheque.他在支票上签了名。