Definition of building

• 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"
• the act of constructing something; "during the construction we had to take a detour"; "his hobby was the building of boats"
• the commercial activity involved in repairing old structures or constructing new ones; "their main business is home construction"; "workers in the building trades"