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pressure gradient

noun Meteorology.
  1. the change in atmospheric pressure per unit of horizontal distance in the direction in which pressure changes most rapidly.
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Origin of pressure gradient

First recorded in 1915–20
Also called barometric gradient.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for barometric gradient

pressure gradient

noun
  1. the change of pressure per unit distanceSee adverse pressure gradient, favourable pressure gradient
  2. meteorol the decrease in atmospheric pressure per unit of horizontal distance, shown on a synoptic chart by the spacing of the isobars
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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