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- milestone 1
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
Anticipation for the milestone holiday has been building for much of the year, serving as an opportunity for Americans to reflect on their complicated history as onetime colonists of an empire who became a superpower of their own.
—
Steven Sloan,
Los Angeles Times,
5 July 2026
Chapman allowed back-to-back singles after his milestone strikeout, but got Jo Adell to ground into a double play to secure his 17th save.
—
ABC News,
4 July 2026
For the five-year anniversary, Alves took to Instagram to share what the milestone meant to her.
—
Janelle Ash,
FOXNews.com,
4 July 2026
The president blended patriotic spectacle with campaign-style politics, reshaping a civic milestone around his leadership and worldview.
—
Natalie Allison,
Washington Post,
4 July 2026
See All Example Sentences for milestone
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Steven Sloan,
Los Angeles Times,
5 July 2026
Chapman allowed back-to-back singles after his milestone strikeout, but got Jo Adell to ground into a double play to secure his 17th save.
—
ABC News,
4 July 2026
For the five-year anniversary, Alves took to Instagram to share what the milestone meant to her.
—
Janelle Ash,
FOXNews.com,
4 July 2026
The president blended patriotic spectacle with campaign-style politics, reshaping a civic milestone around his leadership and worldview.
—
Natalie Allison,
Washington Post,
4 July 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 5 Jul. 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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