1. (verb)yawn, yawning, oscitance, oscitancy an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom "he could not suppress a yawn"; "the yawning in the audience told him it was time to stop"; "he apologized for his oscitancy"
2. (verb)yawn utter a yawn, as from lack of oxygen or when one is tired "The child yawned during the long performance"
3. (verb)gape, yawn, yaw be wide open "the deep gaping canyon"
Definition of 'yawn' 
