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

Definition of milestone

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

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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

To kick off her birthday weekend, officials in Harlem, New York, threw Murphy a neighborhood birthday party to mark the incredible milestone, CNN reported. Claudia Harmata,, "Harlem Woman Becomes the Oldest Person in the United States at 114," 7 July 2019 DeepNudes represents a depressing milestone in the history of this technology, making the creation of nonconsensual nudes as easy as clicking a button. James Vincent, The Verge, "Copies of AI deepfake app DeepNude are easily accessible online — and always will be," 3 July 2019 Getty Images In April, Lori Lightfoot reached a major milestone, becoming the first Black woman, and the first openly gay person, to be elected to the Windy City’s highest office. Adrienne Samuels Gibbs, Marie Claire, "Chicago Mayor Lori Lightfoot Is Ready to Shake Up the City," 26 June 2019 There are a few events to celebrate that milestone, and plenty other things to do, in Cleveland today. Anne Nickoloff,, "Cuyahoga50, and other things to do Saturday, June 22," 22 June 2019 For example, look for motivated self-starters with good time management skills, as well as the ability to think through projects, set clear milestones, and meet deadlines. Jenna Schnuer, Fortune, "Turn Remote Worker Pains Into Possibilities With a Pairing of Tech and Talk," 15 June 2019 The acquisition will give Bank First its first branch presence in the four-county metro Milwaukee area and put it over the $2 billion asset milestone, making it the fifth-largest bank based in Wisconsin. Paul Gores, Milwaukee Journal Sentinel, "Acquisition of Cedarburg's Partnership Bank by Manitowoc's Bank First approved," 14 June 2019 Another milestone: Andrean coach Dave Pishkur became the winningest coach in Indiana with an 11-0 victory over Griffith in the Class 3A Griffith Regional semifinals. Mike Hutton, Post-Tribune, "Baseball notes: William Roberts leads Washington Township under the watchful eyes of his father and brother," 7 June 2019 The pictures also capture a special milestone: Prince Louis is walking! (P.S. Krystin Arneson, Glamour, "These New Pictures of Prince George, Princess Charlotte, and Prince Louis Will Make Your Heart Melt," 19 May 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'milestone.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of milestone

1662, in the meaning defined at sense 1

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Statistics for milestone

Last Updated

11 Jul 2019

Look-up Popularity

Time Traveler for milestone

The first known use of milestone was in 1662

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More Definitions for milestone



English Language Learners Definition of milestone

: a stone by the side of a road that shows the distance in miles to a specified place
: an important point in the progress or development of something : a very important event or advance


mile·​stone | \ ˈmīl-ˌstōn How to pronounce milestone (audio) \

Kids Definition of milestone

1 : a stone by the side of a road showing the distance in miles to a given place
2 : an important point in progress or development His discovery was a major milestone in scientific research.

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Comments on milestone

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