| polar front n. The region or boundary separating air masses of polar origin from those of tropical or subtropical origin. |
polar front
n
(Earth Sciences / Physical Geography) Meteorol a front dividing cold polar air from warmer temperate or tropical air
| polar front The region or boundary separating air masses of polar origin from those of tropical or subtropical origin. The position of the polar front during winter in a particular hemisphere is at approximately 30° latitude, while in the summer it is at approximately 60° latitude. The convergence of warm and cool air masses along the polar front often produces cyclonic wind systems. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  polar front - the front of an advancing mass of colder airfront - (meteorology) the atmospheric phenomenon created at the boundary between two different air masses squall line - a cold front along which squalls or thunderstorms are likely |
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