the change in atmospheric pressure per unit of horizontal distance in the direction in which pressure changes most rapidly.
Origin of pressure gradient
First recorded in 1915–20
Also called barometric gradient.
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British Dictionary definitions for barometric gradient
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