The zone that separates two air masses when the denser and cooler mass is replacing the warmer mass as it advances describes the cold front. It is a boundary line that is between cold air and a warm air mass where the cold air pushes from under and behind as it advances.
There was no "front" in the Cold War.
warmer than a cold front and colder than a cold front
A stationary front
i have no idea ocean
A cold front.
a cold front moves up rapidly.
An Arctic cold front.
An advancing cold front.
This is would be a cold front.
It is called a lower pressure front.
When a cold front overtakes a warm front, it is known as an occluded front. This occurs when the cold air behind the cold front catches up with the warm air ahead of the warm front, forcing the warm air upward.
a warm front moves faster then a cold front because it is less dense