What is the meaning of Yawn?

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; gape.

To open the mouth, or to gape, through surprise or bewilderment.

To be eager; to desire to swallow anything; to express desire by yawning.

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.

Source: wiktionary.org