milestone
noun
- 1
A stone milepost (or by extension in other materials), one of a series of numbered markers placed along a road at regular intervals, typically at the side of the road or in a median.
- 2
An important event in a person's life or career, in the history of a nation, in the life of some project, etc.
Synonyms
verb
- 1
To place milestones along (a road, etc.).
- 2
To plan out a project as a series of major steps.
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