pressure gradient

noun Meteorology.
the change in atmospheric pressure per unit of horizontal distance in the direction in which pressure changes most rapidly.
Also called barometric gradient.


Origin:
1915–20

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
pressure gradient
 
n
1.  adverse pressure gradient See favourable pressure gradient the change of pressure per unit distance
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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Example sentences
As the low approached, its pressure gradient grew ominously steeper.
The larger the temperature difference, the tighter the pressure gradient and the stronger the wind speed.
The horizontal differential creates a pressure gradient which drives advection.
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