The three-dimensional form and size of a building. Often referring to the impact of the length of a building's street frontage, depth from front to back and height, all of which may vary in profile. It generally refers to the built volume above natural ground level.

Three dimensional bulk of a structure: height, width, and depth.

combined effect of height, bulk and silhouette of a building or group of buildings.

The close alignment of three or more planets—or two or more planets and the Moon—as seen from Earth. This occurs when all the bodies involved in the massing have similar ecliptic longitudes.

The outline of a dwelling's external shape and form.