| NOUN | phenomenon | polar front, cold front | the front of an advancing mass of colder air |
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| Meaning | The front of an advancing mass of colder air. | |
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| Synonym | cold front | |
| Narrower | squall line | A cold front along which squalls or thunderstorms are likely |
| Broader | front | (meteorology) the atmospheric phenomenon created at the boundary between two different air masses |
| Spanish | frente frío | |
| Catalan | front fred, front polar | |
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