Blōw'-hōle, n.
n. 1. A cavern in a cliff, at the water-level, opening to the air at its farther extremity, so that the waters rush in with each surge and rise in a lofty jet from the extremity. Dana.
Sense 2. One of the nostrils or spiracles on the upper part of a whale’s head.
Sense 3. A hole in the ice to which whales and seals come to breathe.