A yawn is a reflex consisting of the simultaneous inhalation of air and the stretching of the .... Gordon Gallup, who hypothesizes that yawning may be a means of keeping the brain cool, also hypothesizes that "contagious" yawning may be a ...
Yawn definition, to open the mouth somewhat involuntarily with a prolonged, deep inhalation and sighing or heavy exhalation, as from drowsiness or boredom .
Yawning definition, being or standing wide open; gaping: the yawning mouth of a cave. See more.
Define yawn: to open wide : gape — yawn in a sentence.
Define yawning: wide open : cavernous; showing fatigue or boredom by yawns — yawning in a sentence.
Jun 28, 2013 ... Pinpointing exactly why we yawn is a tough task, but the latest research ... which means it tends to heat up more than other organ systems.
yawn definition, meaning, what is yawn: to open the mouth wide and take a lot of air into the lungs and slowly send it out…. Learn more.
The reflex that makes you open your mouth wide, inhale, and then exhale is called a yawn. Even seeing photos of other people's yawns (or reading the word ...
Define yawn. yawn synonyms, yawn pronunciation, yawn translation, English dictionary definition of yawn. v. yawned , yawn·ing , yawns v. intr. 1. To open the ...