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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
Despite her difficult start, Kaiko has since been recovering in her new home, with the viral video capturing a quiet but significant milestone—her first night sleeping indoors.
—
Alice Gibbs, MSNBC Newsweek, 31 Mar. 2026
Other milestones include higher qubit counts — which increase the potential size and complexity of problems a quantum computer can represent and help solve — and coherence times, which allow more reliable computations by reducing the impact of noise and errors.
—Dylan Butts,matthew Chin, CNBC, 30 Mar. 2026
How to watch the Artemis II mission ABC News will have live coverage of NASA's Artemis II mission, including a live blog for the duration of the mission, and major milestones such as the launch and splashdown broadcast on ABC News Live and streaming on Disney+ and Hulu.
—Mary Kekatos, ABC News, 30 Mar. 2026
The milestone, revealed as part of its latest production update, signals a turning point for the robotics sector as the industry moves from early testing phases into large-scale real-world deployment.
—Sujita Sinha, Interesting Engineering, 30 Mar. 2026
See All Example Sentences for milestone
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Alice Gibbs, MSNBC Newsweek, 31 Mar. 2026
Other milestones include higher qubit counts — which increase the potential size and complexity of problems a quantum computer can represent and help solve — and coherence times, which allow more reliable computations by reducing the impact of noise and errors.
—Dylan Butts,matthew Chin, CNBC, 30 Mar. 2026
How to watch the Artemis II mission ABC News will have live coverage of NASA's Artemis II mission, including a live blog for the duration of the mission, and major milestones such as the launch and splashdown broadcast on ABC News Live and streaming on Disney+ and Hulu.
—Mary Kekatos, ABC News, 30 Mar. 2026
The milestone, revealed as part of its latest production update, signals a turning point for the robotics sector as the industry moves from early testing phases into large-scale real-world deployment.
—Sujita Sinha, Interesting Engineering, 30 Mar. 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 1 Apr. 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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