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[uhp-draft, -drahft] /ˈʌpˌdræft, -ˌdrɑft/
the movement upward of air or other gas.
Origin of updraft
late Middle English
1400-50; late Middle English; see up-, draft Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for updraft
  • The hawk drifted, riding an updraft, its screeching sound carrying over the thrum of the waves.
  • The air in the downdraft wrapped around the air in the updraft.
  • It was being sucked into the updraft of a storm cloud.
  • The fire's updraft, for example, sucks in air and generates winds that fan the flames.
  • He flipped his wrist, and the hat skimmed out the window and caught an updraft and soared.
  • But there was a great updraft in the scorching gulch.
  • As you might imagine, water vapor in a rising updraft will eventually freeze, or become supercooled.
  • In general, the stronger the updraft, the larger the hail.
  • The large hail that often precedes tornadoes forms as a result of the intense updraft feeding the thunderstorm.
  • Without the updraft of warm humid air, the tornado's spiraling winds unravel and weaken, and it falls apart.
Word Origin and History for updraft

"rising air current," 1909, from up + draft (n.).

Online Etymology Dictionary, © 2010 Douglas Harper
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updraft in Science
An upward current of warm, moist air. With enough moisture, the current may visibly condense into a cumulus or cumulonimbus cloud. Compare downdraft.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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