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milestone

American  
[mahyl-stohn] / ˈmaɪlˌstoʊn /

noun

  1. a stone functioning as a milepost.

  2. a significant event or stage in the life, progress, development, or the like of a person, nation, etc..

    Her getting the job of supervisor was a milestone in her career.
milestone British  
/ ˈmaɪlˌstəʊn /

noun

  1. a stone pillar that shows the distance in miles to or from a place

  2. a significant event in life, history, etc

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of milestone

First recorded in 1740–50; mile + stone

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"The traditional brown envelope moment is still an important milestone for students, it's a chance to see friends, celebrate together, and connect with staff," Pettman told the BBC.

From BBC

Neven holds up Willow, Google's latest Quantum chip, which has delivered two important milestones.

From BBC

Tesla shareholders in November approved giving Chief Executive Elon Musk $1 trillion in Tesla stock if he hits certain milestones over the next decade.

From The Wall Street Journal

Mobile shopping hit a milestone as well, with most online transactions—56.4%— taking place on a smartphone this season.

From Barron's

That means Cohen can unlock lesser awards by hitting lower milestones.

From MarketWatch

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.