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milestone
noun
mile·stone
ˈmī(-ə)l-ˌstōn 
1
: a stone serving as a milepost (see milepost sense 1)
2
: a significant point in development
Graduating from college was an important milestone in her life.
Examples of milestone in a Sentence
the new drug was regarded as a milestone in the treatment of heart disease
Recent Examples on the Web
The Dow reaching 50,000 is an amazing milestone, Silverblatt said.
—
John Towfighi, CNN Money, 16 Feb. 2026
Public relationship milestones may arrive—engagements, breakups, or defining conversations that put love front and center.
—Christina Pérez, Vogue, 16 Feb. 2026
Malaysia and Vietnam hit domestic production milestones last year and Indonesia, like Singapore, recently announced plans to expand current operations.
—ABC News, 16 Feb. 2026
The Legislature’s goal of getting to that cleaner future by 2040, with real milestones by 2030, is not realistic and will punish working families with ever increasing costs.
—Robert Duffy, New York Daily News, 16 Feb. 2026
See All Example Sentences for milestone
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John Towfighi, CNN Money, 16 Feb. 2026
Public relationship milestones may arrive—engagements, breakups, or defining conversations that put love front and center.
—Christina Pérez, Vogue, 16 Feb. 2026
Malaysia and Vietnam hit domestic production milestones last year and Indonesia, like Singapore, recently announced plans to expand current operations.
—ABC News, 16 Feb. 2026
The Legislature’s goal of getting to that cleaner future by 2040, with real milestones by 2030, is not realistic and will punish working families with ever increasing costs.
—Robert Duffy, New York Daily News, 16 Feb. 2026
See All Example Sentences for milestone
Cite this Entry
“Milestone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/milestone. Accessed 20 Feb. 2026.
Copy CitationKids Definition
milestone
noun
mile·stone
ˈmī(ə)l-ˌstōn
1
: a milepost made of stone
2
: an important point in progress or development
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