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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 joint effort marks a significant milestone in autonomous electronic warfare by showcasing how unmanned systems can detect, analyze and respond to electromagnetic threats in real time without human intervention.
—
Prabhat Ranjan Mishra, Interesting Engineering, 16 Mar. 2026
Earlier this year, the multihyphenate reached a career milestone by securing a Golden Globe.
—Taylor Ardrey, USA Today, 16 Mar. 2026
Meanwhile, his company’s treatment of its essential workers, and the firing of Chris Smalls, an outspoken employee in a Staten Island warehouse, triggered the creation of the first Amazon union—a milestone in the recent surge of labor activism in America.
—George Packer, The Atlantic, 16 Mar. 2026
Perhaps the evening’s most unexpected milestone came with the Academy’s inaugural casting Oscar, awarded to Cassandra Kulukundis.
—Clayton Davis, Variety, 16 Mar. 2026
See All Example Sentences for milestone
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Prabhat Ranjan Mishra, Interesting Engineering, 16 Mar. 2026
Earlier this year, the multihyphenate reached a career milestone by securing a Golden Globe.
—Taylor Ardrey, USA Today, 16 Mar. 2026
Meanwhile, his company’s treatment of its essential workers, and the firing of Chris Smalls, an outspoken employee in a Staten Island warehouse, triggered the creation of the first Amazon union—a milestone in the recent surge of labor activism in America.
—George Packer, The Atlantic, 16 Mar. 2026
Perhaps the evening’s most unexpected milestone came with the Academy’s inaugural casting Oscar, awarded to Cassandra Kulukundis.
—Clayton Davis, Variety, 16 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 20 Mar. 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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