noun (plural: yawns)

1. (defn, English)

verb

1. to open the mouth widely and take a long, rather deep breath, often because one is tired.
2. to present an opening that appears able to swallow one up, literally or metaphorically:

The canyon yawns as it has done for millions of years, and we stand looking, dumbstruck.

Death yawned before us, and I hit the brakes.

noun

1. One of the four humours of ancient and mediaeval physiology, that was believed to be secreted by the liver and to cause irascibility, anger and bad temper when present in excess.