Edge, as of garment; blade, as of a knife.
1The fourth heads up and right to other columns and stalactites at the edge of a roof.
2The Policeman made the find-catching sight of the line where it dangled from the edge of a roof.
3The Black Well hovered just behind me, a dizzying void like the edge of a roof under my heels.
4And it was all because of this man standing on the edge of a roof twelve storeys above the ground.
5A fourth-pitch rising traverse that parallels the sharp-looking edge of a roof below your feet-fallat the wrong moment and you might clear the edge.