1. A post bearing a sign that gives directions or shows the way
   "The hikers relied on guideposts to navigate the complex trail system";
   - signpost
    
2. A rule or principle that provides guidance to appropriate behaviour
   "As a guidepost, invest no more than 10% of your portfolio in a single stock";
   - guideline, rule of thumb

Derived forms: guideposts

Type of: regulation, rule, sign

Encyclopedia: Guidepost