Building/ˈbɪldɪŋ/ Definition 1 of 3Pro Tip 1/3Physical Structure Refers to physical buildings you can see, like houses or schools. The old building was renovated into a library. Pro Tip 2/3Fixed Locations Buildings are fixed in one place and don't move. Meet me by the red building at the corner. Pro Tip 3/3Descriptive Adjectives Often described by their function, size, shape, or condition. She lives in that tall glass building downtown.