The maximum opening of the mouth (of a bird, fish, etc.) when it is open.
An act of gaping; a yawn.
A disease in poultry caused by gapeworm in the windpipe, a symptom of which is frequent gaping.
The width of an opening.
A large opening.
To open wide; to display a gap.
To open the passage to the vomeronasal organ, analogous to the flehming in other animals.
To depict a dilated anal or vaginal cavity upon penetrative sexual activity.
To stare in wonder.
To open the mouth wide, especially involuntarily, as in a yawn, anger, or surprise.
A pore or opening used (especially by arthropods and some fish) for respiration.
Any small aperture or vent for air or other fluid.
The blowhole of a whale, dolphin or other similar species.