From Longman Dictionary of Contemporary Englishcold frontˈcold front noun [countable] the front edge of a mass of cold air heading towards a place → warm front
Examples from the Corpus
cold front• Never risk parking out overnight without checking the weather forecast for a strong wind warning or the approach of a cold front.• Forecasters are banking on a cold front to clear cloudy conditions.• Another cold front passed through the north state Monday night and early Tuesday, chilling the region with November-like temperatures.• Clearing conditions were forecast behind the cold front that dragged low clouds through Central Florida early Friday. 