Yawn v. i. [imp. & p. p. Yawned p. pr. & vb. n. Yawning.]
  1. To open the mouth involuntarily through drowsiness, dullness, or fatigue; to gape; to oscitate.  “The lazy, yawning drone.”
  And while above he spends his breath,
  The yawning audience nod beneath.   --Trumbull.
  2. To open wide; to gape, as if to allow the entrance or exit of anything.
  't is now the very witching time of night,
  When churchyards yawn.   --Shak.
  3. To open the mouth, or to gape, through surprise or bewilderment.
  4. To be eager; to desire to swallow anything; to express desire by yawning; as, to yawn for fat livings.  “One long, yawning gaze.”