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.

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Origin of downdraft

First recorded in 1780–90; down1 + draft
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Scientific definitions for downdraft

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.