Wiktionary
n. Any material which is used for construction purposes.
WordNet
n. material used for constructing buildings
Wikipedia
Building material is any material which is used for construction purposes. Many naturally occurring substances, such as clay, rocks, sand, and wood, even twigs and leaves, have been used to construct buildings. Apart from naturally occurring materials, many man-made products are in use, some more and some less synthetic. The manufacture of building materials is an established industry in many countries and the use of these materials is typically segmented into specific specialty trades, such as carpentry, insulation, plumbing, and roofing work. They provide the make-up of habitats and structures including homes.
Usage examples of "building material".
The only real difference between a man born of a mother and father and a perfectly humanized machine would be the building material: living, nonliving.
Had I saved fuel enough to stop, that dust would have served as food and fuel and building material.
Eiffel's fountain sparkled in the balmy night air, a monument to the skills and vision of long-dead engineers who thought iron the ultimate building material.
Erected of the wonderful metallic glass that seemed to have been a favorite building material of the Cocytans, it cast a golden glow over its surroundings.
All three moons had large amounts of rock scattered over their icy surfaces, the remnants of meteoric impact for the most part, carbonaeous chondrite rubble, a very useful building material.
Her breath was coming fast as she raced across the steel landing crowded with rolls of insulation and building material.
For another, they claimed that no finds had yet supplied proof that the islanders had ever had wood at their disposal as building material (for rollers).
If you could do that with stone or metal, what a building material you'd have.