noun

milestone

milestone, landmark

This discovery is a milestone in science.

This discovery is a milestone in science.

Graduation is a major milestone in life.

Graduation is a major milestone in life.

a milestone in (sth.) This is a milestone in our company's history.

a milestone for (sb.) This award is a real milestone for her.

Synonyms: breakthrough, achievement, landmark

Literally 'mile' + 'stone'. Originally a stone marker placed at one-mile intervals along a road.

Imagine a stone marking a significant point on a long journey, which now refers to a significant stage in life or a project.

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