(n.) A post, or one of a series of posts, set up to indicate spaces of a mile each or the distance in miles from a given place.

Samson post arrow baluster balustrade banister bench mark blaze bookmark cairn catstone compass needle direction direction post doorjamb doorpost finger post fist gatepost guide guideboard guidepost hand hitching post hour hand index index finger jamb king post landmark lead lighthouse lightship lubber line mark marker menhir milestone minute hand monument mullion needle occasion pharos platform pointer post seamark signboard signpost snubbing post stanchion standard stile tower upright watchtower