air pocket

noun

1. (not in technical use) a nearly vertical air current that can cause an aircraft to experience a sudden change in altitude, usually a decrease.

air pocket

noun

1. a localized region of low air density or a descending air current, causing an aircraft to suffer an abrupt decrease in height
2. any pocket of air that prevents the flow of a liquid or gas, as in a pipe

Word History and Origins

Origin of air pocket¹

First recorded in 1910–15

Example Sentences

He explained that as a result, the victims then sought refuge on the boat's left side, where the last air pockets remained as it sank.

From BBC

A lot of arugula flattens out when it’s packed, making it more prone to sliminess or rot, but Esmee’s ruffled edges add volume, with air pockets between the leaves that keep it drier and fresher.

From Seattle Times

The artist Gala Porras-Kim watched approvingly during a visit in March, pointing out the air pockets that had started to form.

From New York Times

Somehow, before his arms became completely sealed up in snow, he punched a small air pocket in front of his face.

From Los Angeles Times

The cupped hands provide a tiny air pocket.

From Seattle Times