air mass

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air mass

n.
A large body of air with only small horizontal variations of temperature, pressure, and moisture.

air mass

n
(Physical Geography) a large body of air having characteristics of temperature, moisture, and pressure that are approximately uniform horizontally

air′ mass`


n.
a body of air covering a wide area, exhibiting approximately uniform properties through any horizontal section.
[1890–95]

air mass

A fairly uniform mass of air covering a large area and containing air of, for example, polar or tropical origin.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.air mass - a large body of air with uniform characteristics horizontally
atmospheric state, atmosphere - the weather or climate at some place; "the atmosphere was thick with fog"
high - an air mass of higher than normal pressure; "the east coast benefits from a Bermuda high"
low, depression - an air mass of lower pressure; often brings precipitation; "a low moved in over night bringing sleet and snow"
References in periodicals archive ?
Wednesday's weather is expected to be affected by yet another polar air mass accompanied by thunder and rain storms with hail from time to time.
Forecasters warned the late-season storm is expected to combine with a polar air mass near the United States next week, potentially producing a highly unusual and potent storm that could wreak havoc along the US East Coast.
Ireland escaped the Siberian air and got mild weather instead, so the cold Polar air mass means people will certainly feel the difference on Saturday and Sunday.