milestone
nounUK /ˈmaɪl.stəʊn/
US /ˈmaɪl.stoʊn/
A milestone is an important moment or event in your life.
Learning to ride a bike was a big milestone for me.
RELATED WORDS
OTHER MEANINGS
2. A stone beside a road that shows how far you have traveled.
We stopped by the milestone to check the distance to the next town.
3. A significant stage in the development of a project or process.
Finishing the first draft was a major milestone in the project.
4. A marker used to measure distance along a route.
The old milestones along the highway date back a hundred years.