'Milepost' definitions:

Definition of 'milepost'

(from WordNet)
noun
Stone post at side of a road to show distances [syn: milestone, milepost]

Definition of 'Milepost'

From: GCIDE
  • Milepost \Mile"post`\, 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. [1913 Webster]
  • 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.
  • Syn: milestone. [PJC]