Definitions
1.verbTo open the mouth wide, especially involuntarily, as in a yawn, anger, or surprise.
2.verbTo stare in wonder.
3.verbTo open wide; to display a gap.
4.verbOf a cat: to open the passage to the vomeronasal organ, analogous to the flehming in other animals.
5.adjectiveWide open."There’s a gaping hole in the fence."