The meaning of YAWN is to open wide : gape. How to use yawn in a sentence.

YAWN definition: 1. to open the mouth wide and take a lot of air into the lungs and slowly send it out, usually when…. Learn more.

A yawn is a reflex in vertebrate animals characterized by a long inspiratory phase with gradual mouth gaping, followed by a brief climax (or acme) with muscle stretching, and a rapid expiratory phase with muscle relaxation, which typically lasts a few seconds.

If you yawn, you open your mouth very wide and breathe in more air than usual, often when you are tired or when you are not interested in something.

yawn - an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom; "he could not suppress a yawn"; "the yawning in the audience told him it was time to stop"; "he apologized for his oscitancy"

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 …

We yawn when we're very bored or tired, or when our bodies need an influx of oxygen. Scientists aren't completely in agreement about all the reasons why we yawn, but the "contagious yawn " happens across all human societies and even in non-human animals like chimpanzees and dogs.

Definition of yawn verb from the Oxford Advanced Learner's Dictionary. [intransitive] to open your mouth wide and breathe in deeply through it, usually because you are tired or bored. He stood up, stretched and yawned. We couldn't help yawning during the speech. + speech ‘Wow,’ she yawned, ‘a customer.’. Want to learn more?

YAWN meaning: 1. to open the mouth wide and take a lot of air into the lungs and slowly send it out, usually when…. Learn more.

To open the mouth wide, esp. involuntarily, and breathe in deeply, as a result of fatigue, drowsiness, or boredom. To express or utter with a yawn. To be or become wide open; gape. A yawning chasm. To open the mouth widely and take a long, rather deep breath, often because one is tired and sometimes accompanied by pandiculation.