Signboard (noun)

1. A board displaying a notice, advertisement, or message, typically in public place.
2. A board that indicates the direction to a particular place.

Origin:

Late middle english (in the sense "notice, advertisement"): from old french signe borde, literally "sign border", from signe "sign" + borde "border".

Examples:

1. A huge signboard hung above the entrance to the hotel.
2. He looked up and saw the signboard pointing to the nearest gas station.
3. A signboard indicating the way to the nearest town was put up at the crossroads.
4. The signboard showed the name of the restaurant and its opening hours.
5. They placed a signboard at the entrance of the park, warning visitors not to feed the animals.