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microburst

[mahy-kruh-burst]
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noun Meteorology.
  1. an intense, localized downdraft of air that spreads on the ground, causing rapid changes in wind direction and speed; a localized downburst.
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Origin of microburst

First recorded in 1980–85; micro- + burst
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for microburst

microburst

noun
  1. another name for downburst
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
microburst in Science

microburst

[mī′krō-bûrst′]
  1. A sudden, violent downdraft of air over a small area (less than 16 sq km or 6.24 sq mi) that lasts at least 25 minutes. Microbursts can cause winds with speeds as high as 270 km (167 mi) per hour. They are difficult to detect and predict with standard weather instruments. They are especially hazardous to airplanes during landing or taking off.
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