the structure forming the upper covering of a building or vehicle.
the top inner surface of a covered area or space; the ceiling: the roof of the cave fell in.
used to signify a house or other building, especially in the context of hospitality or shelter: helping those without a roof over their heads | they slept under the same roof.
Annihilated.
But there’s no source.
Roof roof! Rrrrrr-roof
Which dictionary is that?
The New Oxford American.