noun
1.
a. : a hole to admit or discharge air
b. : water not frozen over especially because of a spring or current in a river or pond
2. : a discontinuity produced in a foundry casting by a bubble of gas : blowhole
3. : air pocket 1
noun
1.
a. : a hole to admit or discharge air
b. : water not frozen over especially because of a spring or current in a river or pond
2. : a discontinuity produced in a foundry casting by a bubble of gas : blowhole
3. : air pocket 1
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012