air mass

English Thesaurus

1. a large body of air with uniform characteristics horizontally (noun.state)

hypernym	:	atmosphere, atmospheric state,
definition	:	the weather or climate at some place (noun.state)

hyponym	:	high,
definition	:	an air mass of higher than normal pressure (noun.state)

hyponym	:	depression, low,
definition	:	an air mass of lower pressure; often brings precipitation (noun.state)