Yawn meaning : The action of yawning; opening the mouth widely and taking a long, rather deep breath, often because one is tired or bored. A particularly boring event. To open the mouth widely and take a long, rather deep breath, often because one is tired or bored, and sometimes accompanied by pandiculation. To say while yawning. To present a wide opening. To open the mouth, or to gape, through surprise or bewilderment. To be eager; to desire to swallow anything; to express desire by yawning.