Noah Webster's Dictionary (n.) A post on which a sign hangs, or on which papers are placed to give public notice of anything.

Multi-Version Concordance Signpost (1 Occurrence) Ezekiel 21:19 Also, thou son of man, appoint thee two ways, that the sword of the king of Babylon may come; they twain shall come forth out of one land: and mark out a place, mark it out at the head of the way to the city. (See JPS DBY NAS RSV NIV)