air hole

American  

noun

1. an opening to admit or discharge air.

2. a natural opening in the frozen surface of a river or pond.

3. air pocket.

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air hole British  

noun

1. a hole that allows the passage of air, esp for ventilation

2. a section of open water in a frozen surface

3. a less common name for air pocket

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Etymology

Origin of air hole

First recorded in 1760–70

Example Sentences

The cat could be seen through a perspex dome in Schiffer's argyle-patterned backpack cat cattier - complete with plenty of air holes.

From BBC

One bold escape happened in 1849 when Henry “Box” Brown was packed and shipped in a three-foot-long box with three air holes drilled in.

From National Geographic Kids

Step 6: Tie the bags closed and poke in air holes.

From Los Angeles Times

This year the company sent 100 beetles to Tokyo - down from 300 last year - held in little plastic cases with air holes and food.

From Washington Times

This year the company sent 100 beetles to Tokyo — down from 300 last year — held in little plastic cases with air holes and food.

From Seattle Times