milestone

/ˈmaɪlˌstoʊn/
noun
  1. An important event or achievement in a process or development.
    • The company celebrated a milestone of selling one million products.
    • Learning to ride a bike is a milestone for many children.
    • Graduating from college was a major milestone in her life.
  2. A stone marker by the side of a road that shows the distance to a particular place.
    • We stopped at a milestone that said 10 miles to the next town.
    • The old milestone on the country road is from the 1800s.
    • Hikers used the milestone to track how far they had walked.
What does "milestone" mean? | whatsthatwordmean | whatsthatwordmean