👉 The term "yawn" is a colloquial expression that describes yawning or rolling back of the lips, often in response to sleepiness or boredom. The exact definition of "yawning," however, varies by culture and may not be universally recognized. In some cultures, yawns are considered an act of self-punishment or as a way to relax. For example, in many parts of Asia, especially in Japan and Korea, it is common for people to yawn when they wake up, typically at the onset of sleep. In other cultures, yawns may be seen as a sign of politeness or respect towards others. In some North American states, for instance, it has become an accepted way to greet each other upon meeting. Ultimately, the exact definition and meaning of "yawning" can vary widely depending on cultural and individual perspectives.