Definition of building encompasses the structure, its fabric and the ground within its walls for statutory purposes. Definition of building centers on its physical character as a constructed edifice and extends to the materials and land integral to it. Judicial exposition emphasizes the ordinary meaning as a fabric enclosed by walls and usually covered by a roof. Statutory treatment adopts an inclusive approach: building comprises the fabric of which it is composed, the ground on which its walls stand, and the area embraced within those walls.