occluded front cold occluded front 2019-08-22T08:55:43Z envoAtmo An occluded front which is adjacent to a cold front 1) that is moving away from the coldest air in the vicinity, 2) where the neighbouring cold front undercuts the neighbouring warm front in the occulsion zone, and 3) where the coldest air in the vicinity replaces less cold air towards the surface of the astronomical body.