What does the word yawn mean?

Usage examples for yawn

  1. Maitland politely interposed his fingers between his yawn and the detective's intent regard. – The Brass Bowl by Louis Joseph Vance
  2. Shall Earth yawn open and engulph the towns? – Pharsalia; Dramatic Episodes of the Civil Wars by Lucan
  3. " Yes," said Nelly, with a loud yawn, which she did not attempt to check. – Silver Lake by R.M. Ballantyne