01 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.
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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.
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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.