Milestone Definition

mīlstōn
milestones
noun
milestones
A stone or pillar set up to show the distance in miles to or from a specified place.
Webster's New World
A significant or important event in history, in the career of a person, etc.
Webster's New World

A stone milepost (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.

Wiktionary
verb
To place milestones along (a road, etc.).
Wiktionary
To plan out a project as a series of major steps.
Wiktionary
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Other Word Forms of Milestone

Noun

Singular:
milestone
Plural:
milestones

Origin of Milestone

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