milestone

noun

mile·​stone ˈmī(-ə)l-ˌstōn How to pronounce milestone (audio)
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.

Illustration of milestone

Illustration of milestone
  • milestone 1

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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Just 105 days after its release in October 2024, the song is the fifth fastest music video to reach the milestone. Rania Aniftos, Billboard, 5 Feb. 2025 Shootings in New York City dropped by 21% last month compared to January 2024 — reaching milestone low not seen in January for more than three decades, NYPD Commissioner Jessica Tisch said Tuesday. Thomas Tracy, New York Daily News, 4 Feb. 2025 There has not been an NFL team in the Super Bowl era to reach the milestone. Jaylon Thompson, Kansas City Star, 4 Feb. 2025 After years of advances, Iran could now reach that milestone in just 10 days. Michael Makovsky and John Hannah, Newsweek, 3 Feb. 2025 See all Example Sentences for milestone 

Word History

First Known Use

1662, in the meaning defined at sense 1

Time Traveler
The first known use of milestone was in 1662

Dictionary Entries Near milestone

Cite this Entry

“Milestone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/milestone. Accessed 10 Feb. 2025.

Kids Definition

milestone

noun
mile·​stone ˈmī(ə)l-ˌstōn How to pronounce milestone (audio)
1
: a milepost made of stone
2
: an important point in progress or development

More from Merriam-Webster on milestone

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!