DictionaryyawnWide-mouthed breath
verb / noun

yawn

YAWN/jɔːn/

To open the mouth wide and breathe deeply, usually from tiredness or boredom.

The sleepy young man yawns as he sits on his bed.

A sleepy young man sitting on the edge of his bed yawns widely, eyes squeezed nearly shut and one hand raised beside his mouth without obscuring it.
Etymology

Old English ginian meant to open the mouth wide. The meaning narrowed to the involuntary opening associated with drowsiness or boredom, rather than gaping more generally.

In context

Old Time Radio Researchers20:50
I'm not going to open my mouth on this program except to yawn until you give me what you promised me
Jack Benny - JB 1938-03-27 Guests Fred Allen & Kate Smith (West)

More examples

  • I keep yawning after staying up too late.
  • She covers her mouth to hide a yawn during the meeting.
  • The baby yawned and closed his eyes.

Forms

yawn · yawns · yawned · yawning

Similar words

gape
Means opening the mouth wide, without necessarily breathing deeply.