Definitions of yawn:
- noun: an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom
Example: "He could not suppress a yawn"
- verb: utter a yawn, as from lack of oxygen or when one is tired
Example: "The child yawned during the long performance"
- verb: be wide open
- name: A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #13368)