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.
Willy Chavarria has secured a strategic minority investment from Chalhoub Group, WWD has learned, marking a significant milestone for the designer whose culturally conscious menswear has resonated far beyond New York. Ritu Upadhyay, Footwear News, 14 Oct. 2025 Hosted by award-winning actor, writer, and producer Aasif Mandvi, the milestone event is said to host a variety of leading filmmakers, industry professionals, and special guests for an evening celebrating excellence in documentary filmmaking. Marcus Jones, IndieWire, 14 Oct. 2025 The milestone follows León’s relationship with his manager and business partner, Jorge Juárez, who began overseeing his career nearly two years ago. Leila Cobo, Billboard, 14 Oct. 2025 Key milestones achieved The flight test commenced with the Super Heavy booster successfully igniting all 33 Raptor engines. Mrigakshi Dixit, Interesting Engineering, 14 Oct. 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

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Cite this Entry

“Milestone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/milestone. Accessed 21 Oct. 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
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