Milestone
/mˈaɪˌlstoʊn/
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Definition
(noun) 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.
Sentence Examples
That day was an important milestone in our project.
It's an important milestone for her.
CEFR Practice Quiz
Graduating from college was a significant ____ in her life, marking the successful completion of years of hard work and dedicated study.