emdashes

noun
  1. Plural of emdash; a long horizontal punctuation mark (—) used to indicate a break in thought, an interruption, or to set off a phrase or clause.
  2. Usage: Also called an em rule or em dash.; Typographically, an emdash is one em unit wide (the width of the letter 'm' in a given font).; Common in formal and informal writing.

Examples