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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
In a first for the China Space Station, crew members from the Shenzhou-20 and Shenzhou-21 missions have used a new oven to cook and enjoy a space barbecue, marking a milestone in comfort and innovation aboard the station.
—
Neetika Walter, Interesting Engineering, 4 Nov. 2025
The Global Times compared the cooking milestone to one notched aboard the ISS in 2019, when NASA astronauts baked cookies in space using a prototype Zero G oven.
—Josh Dinner, Space.com, 4 Nov. 2025
Japan hit another immigration milestone this year, with foreign residents in 27 municipalities now comprising over 10 percent of the local population, according to new government statistics.
—Micah McCartney, MSNBC Newsweek, 4 Nov. 2025
Nevertheless, the Logic Theorist was indeed a major milestone in the development of AI, and perhaps even of our understanding of intelligence in general.
—Big Think, 4 Nov. 2025
See All Example Sentences for milestone
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Neetika Walter, Interesting Engineering, 4 Nov. 2025
The Global Times compared the cooking milestone to one notched aboard the ISS in 2019, when NASA astronauts baked cookies in space using a prototype Zero G oven.
—Josh Dinner, Space.com, 4 Nov. 2025
Japan hit another immigration milestone this year, with foreign residents in 27 municipalities now comprising over 10 percent of the local population, according to new government statistics.
—Micah McCartney, MSNBC Newsweek, 4 Nov. 2025
Nevertheless, the Logic Theorist was indeed a major milestone in the development of AI, and perhaps even of our understanding of intelligence in general.
—Big Think, 4 Nov. 2025
See All Example Sentences for milestone
Cite this Entry
“Milestone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/milestone. Accessed 6 Nov. 2025.
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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