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Related to downdraft: microburst
A current of air or other gas that travels downward, as during a thunderstorm or in a mine shaft.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
downdraft, Brit. downdraught
1. A downward current of air in a chimney or flue, often carrying smoke with it.
2. A downward current of air resulting from the passage of air across a window surface, which cools it and increases its density so that it moves downward.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
A relatively small-scale downward current of air. These are common near cumuliform clouds, in precipitation areas, and on leeward side of large features. They pose risks to light aircraft and helicopters, especially those flying near the ground.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved