downdraft

downdraft [doun-draft, -drahft] Word Origin noun

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

Origin of downdraft First recorded in 1780–90; down1 + draft downdraft in Science downdraft [doun′drăft′]

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