v. & n.
--v.
1. intr. (as a reflex) open the mouth wide and inhale esp. when sleepy or bored.
2 intr. (of a chasm etc.) gape, be wide open.
3 tr. utter or say with a yawn.
--n.
1. an act of yawning.
2 colloq. a boring or tedious idea, activity, etc.
Derivatives:
yawner n. yawningly adv.
Etymology: OE ginian, geonian