wind shear

[ wind ]
/ wɪnd /

noun

the rate at which wind velocity changes from point to point in a given direction.
a condition, dangerous to aircraft, in which the speed or direction of the wind changes abruptly.

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Origin of wind shear

First recorded in 1940–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for wind shear

wind shear
/ (wɪnd) /

noun

stress on an aircraft in an area in which winds of different speeds and directions are close together
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

Scientific definitions for wind shear

wind shear

A change in wind direction and speed between slightly different altitudes, especially a sudden downdraft. Depending on its scale, wind shear can cause a variety of effects, from minor turbulence to tornadoes. Wind shear caused by interactions between oceanic and atmospheric winds can be so strong that it can dissipate hurricanes. See also shear force.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.