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em dash

American  

noun

Printing.
  1. a dash one em long.


em dash British  

noun

  1. printing a dash (—) one em long

"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

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Example Sentences

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Because more than any other punctuation mark, the em dash is deeply human.

From The Wall Street Journal ● Nov. 20, 2025

Along with the now-infamous em dash, many are renouncing words for which ChatGPT is known to have a mysterious penchant, such as delve, nestled, boast, and meticulous.

From Slate ● Aug. 20, 2025

It’s not as though the em dash is the first punctuation mark to get lost in intergenerational translation.

From Salon ● Jun. 11, 2025

She also mentioned a more urgent priority, that her “birthdate be followed in the biographical index by an em dash, and then a blank space.”

From Seattle Times ● Oct. 25, 2022

In instances such as given in the two preceding rules the en dash may sometimes serve if the em dash appears too conspicuous.

From Punctuation A Primer of Information about the Marks of Punctuation and their Use Both Grammatically and Typographically by Frederick W. (Frederick William) Hamilton

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