em dash

noun, Printing.
1.
a dash one em long.
Examples from the web for em dash
  • As shown in the examples above, do not put a space on both sides of an em dash.
  • Understand the origins of the en dash, how it differs from the em dash, and whether it still matters.
  • Use an em dash-instead of a hyphen-as shown here to set off a particular phrase.
  • If not possible, use two hyphens to create an em dash.
  • Use an em dash to signal that an important point is going to be made or that a change in the construction of the sentence follows.
British Dictionary definitions for em dash

em dash

noun
1.
(printing) a dash (—) one em long