Milepost

n.	1.	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.
	2.	An event or accomplishment marking a significant advance in an endeavor; a notable achievment; as, putting a man in orbit was a big milepost on the way to the moon.

Noun

1.

milepost - stone post at side of a road to show distances Synonyms: milestone

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