What is the meaning of yawning?

noun

• An involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom.
  • usage: "he could not suppress a yawn"; "the yawning in the audience told him it was time to stop"; "he apologized for his oscitancy"
  • synonyms: yawn, oscitance, oscitancy

verb

• Utter a yawn, as from lack of oxygen or when one is tired.
  • usage: "The child yawned during the long performance"
  • synonyms: yawn
• Be wide open.
  • usage: "the deep gaping canyon"
  • synonyms: gape, yawn, yaw

adjective

• Gaping open as if threatening to engulf someone or something.
  • usage: "the yawning mine shaft"; "a yawning abyss"
• With the mouth wide open indicating boredom or sleepiness.
  • usage: "a yawning congregation"
• Showing lack of attention or boredom.
  • usage: "the yawning congregation"
  • synonyms: drowsy, oscitant