1. (noun)building, edifice a structure that has a roof and walls and stands more or less permanently in one place
"there was a three-story building on the corner"; "it was an imposing edifice"
2. (noun)construction, building the act of constructing something
"during the construction we had to take a detour"; "his hobby was the building of boats"
3. (noun)construction, building the commercial activity involved in repairing old structures or constructing new ones
"their main business is home construction"; "workers in the building trades"
4. (noun)building the occupants of a building
"the entire building complained about the noise"