The term 'PITCH, AS OF A ROOF' can be summarized as the SLANT of a roof, which is a five-letter word. The angle of a roof is an important factor in determining the amount of water it can shed and how much insulation it can provide. The pitch of a roof is typically measured in terms of the rise and run of the roof, which is the vertical distance and horizontal distance between two points on the roof. The steeper the pitch, the more water it can shed and the more insulation it can provide.