noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A local region of low atmospheric pressure, or a local downward current; especially one that causes an aircraft to lose height suddenly.
2. 2
   a local region of low pressure or descending air that causes a plane to lose height suddenly wordnet

Synonyms

All synonyms

aerospaceaerosphereairair bubblesair holeair hole