A hole to admit or discharge air; specifically, a spot in the ice not frozen over.
2.
(Founding) A fault in a casting, produced by a bubble of air; a blowhole.
3.
(Aeronautics) A local region in the atmosphere having a downward movement and offering less than normal support for the sustaining surfaces of a flying machine, causing an airplane to drop suddenly. Same as air pocket.
... a ravine, and saw at the bottom a thing that looked like a stone. They went down towards it, and when they came nearer, it was a little house. And they went nearer still and came right to it. They climbed up on to the roof, and when they looked down through the air hole in the roof, they saw a little boy on the floor with a cutting-board for a kayak and a stick for a paddle. They called down to him, and he looked up, but then they hid themselves. When they looked down again, he was there as before, playing at being a man in a kayak. A second time ... — Eskimo Folktales • Unknown
... looked like a stone. They went down towards it, and when they came nearer, it was a little house. And they went nearer still and came right to it. They climbed up on to the roof, and when they looked down through the air hole in the roof, they saw a little boy on the floor with a cutting-board for a kayak and a stick for a paddle. They called down to him, and he looked up, but then they hid themselves. When they looked down again, he was there as before, playing ... — Eskimo Folktales • Unknown