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to open the mouth somewhat involuntarily with a prolonged, deep inhalation and sighing or heavy exhalation, as from drowsiness or boredom.
to open wide like a mouth.
to extend or stretch wide, as an open and deep space.
to say with a yawn.
Archaic. to open wide, or lay open, as if by yawning.
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Source: Dictionary.com



In 2007, researchers including a professor of psychology from the University of Albany proposed that yawning may be a means to keep the brain cool.

Yawn | Definition of Yawn by Merriam-Webster


Define yawn: to open your mouth wide while taking in breath usually because you are tired or bored—usage, synonyms, more.

Yawn - definition of yawn by The Free Dictionary


To open the mouth wide with a deep inhalation, usually involuntarily from drowsiness, fatigue, or boredom. 2. To open wide; gape: The chasm yawned at our feet ...

yawn Definition in the Cambridge English Dictionary


5 days ago ... 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.

Yawning - definition of yawning by The Free Dictionary


Noun, 1. yawning - an involuntary intake of breath through a wide open mouth yawning - an involuntary intake of breath through a wide open mouth; usually ...

yawn - definition of yawn in English from the Oxford dictionary


Involuntarily open one's mouth wide and inhale deeply due to tirednes.... Meaning, pronunciation and example sentences, English to English reference content.

Urban Dictionary: yawn


Married man: "Since we got married she has completed changed..she would not even let me talk anymore..besides from the times when i yawn, she keeps my ...

What does YAWN mean? - YAWN Definition - Meaning of YAWN ...


This Internet Slang page is designed to explain what the meaning of YAWN is. The slang word / acronym / abbreviation YAWN means... . Internet Slang. A list of  ...

Why Do We Yawn and Why Is It Contagious? | Science | Smithsonian


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 | Define yawn at Dictionary.com
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Popular Q&A
Q: What is the definition of a yawn?
A: A yawn is to open the mouth wide and take a deep breath usually as an involuntary re... Read More »
Source: www.chacha.com
Q: What is the definition of a yawn?
A: Yawns happen as our bodies try to get rid of extra carbon dioxide. Mostly when we're sleepy! Ask 24/7! Read More »
Source: www.kgbanswers.com
Q: What is the definition of the word yawn?
A: Open the mouth somewhat involuntarily with a prolonged, deep inhalation & Read More »
Source: www.chacha.com
Q: What is medical definition of yawn?
A: n a sex chromosome that in humans and many other species is present only in the male, appearing singly in the normal male. It is carried as a sex determinant by... Read More »
Source: medical-dictionary.thefreedictionary.com
Q: What is financial definition of YAWN?
A: Young and Wealthy but Normal. Self-made wealthy young persons (usually under 35) who live fairly simply. That is, YAWNs tend not to buy fancy cars and houses, b... Read More »
Source: financial-dictionary.thefreedictionary.com