downdraft

[ doun-draft, -drahft ]
/ ˈdaʊnˌdræft, -ˌdrɑft /

noun

a downward current, as of air: a downdraft in a mine shaft.
a downward movement, as of the stock market.

Origin of downdraft

First recorded in 1780–90; down1 + draft

Scientific definitions for downdraft

downdraft
[ doundrăft′ ]

A downward moving current of air in a cumulonimbus cloud. Compare updraft.