downdraft

[doun-draft, -drahft]

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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

downdraft in Science

downdraft

[doundrăft′]

A downward moving current of air in a cumulonimbus cloud. Compare updraft.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.