'Guidepost' definitions:

Definition of 'guidepost'

From: WordNet
noun
A rule or principle that provides guidance to appropriate behavior [syn: guidepost, guideline, rule of thumb]
noun
A post bearing a sign that gives directions or shows the way [syn: signpost, guidepost]

Definition of 'Guidepost'

From: GCIDE
  • Guidepost \Guide"post`\, n. A post at the fork of a road, with a guideboard on it, to direct travelers. [1913 Webster]