Noun
-
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"
Verb
-
be wide open
"the deep gaping canyon"
-
utter a yawn, as from lack of oxygen or when one is tired
"The child yawned during the long performance"