A post on a highway, often with one or more fingerposts, showing the distance in miles to nearby places
A sign or post beside a railway marking the distance from the (actual or nominal) start of a line (usually the principal terminus or junction with a more major line)
To place mileposts along (a road, etc.).
A sign or other marker that indicates the way along a road or trail.
Something that guides or marks the way along a figurative journey; a temporary stopping point.