occluded front
noun [ C ] geography specialized uk/əˈkluː.dɪd ˈfrʌnt/ us/əˈkluː.dɪd ˈfrʌnt/
锢囚锋（两个锋面相遇而形成的锋面，尤指冷空气将其前面的暖空气抬高而形成的锋面）
a situation in the weather when a mass of cold air reaches warm air and pushes the warm air up off of the earth's surface