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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
This arrangement reportedly raised tensions, with Microsoft reportedly worried that OpenAI could prematurely declare AGI, using a high-performing AI model as the milestone, which would have major financial and IP implications for both companies.
—
Beatrice Nolan, Fortune, 28 Oct. 2025
Her return marks a significant milestone, as Hubert famously departed the original sitcom midway through its six-season run.
—Preezy Brown, VIBE.com, 28 Oct. 2025
Penguins star Sidney Crosby became the ninth player in NHL history to score 1,700 points, but acknowledged the awkwardness of speaking about the milestone while the fan incident was still unfolding.
—Ryan Gaydos, FOXNews.com, 28 Oct. 2025
Although not strictly a horror movie — its tone is more comparable to an erotic thriller like 1987's Fatal Attraction — this 1960 feature is a milestone of genre cinema and Korean movies as a whole.
—Katie Rife, Entertainment Weekly, 28 Oct. 2025
See All Example Sentences for milestone
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Beatrice Nolan, Fortune, 28 Oct. 2025
Her return marks a significant milestone, as Hubert famously departed the original sitcom midway through its six-season run.
—Preezy Brown, VIBE.com, 28 Oct. 2025
Penguins star Sidney Crosby became the ninth player in NHL history to score 1,700 points, but acknowledged the awkwardness of speaking about the milestone while the fan incident was still unfolding.
—Ryan Gaydos, FOXNews.com, 28 Oct. 2025
Although not strictly a horror movie — its tone is more comparable to an erotic thriller like 1987's Fatal Attraction — this 1960 feature is a milestone of genre cinema and Korean movies as a whole.
—Katie Rife, Entertainment Weekly, 28 Oct. 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 30 Oct. 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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