Definitions of interior:

• noun:   the inner or enclosed surface of something
• noun:   the region that is inside of something
• noun:   the United States federal department charged with conservation and the development of natural resources; created in 1849
• adjective:   of or coming from the middle of a region or country
• adjective:   inside and toward a center

  Example: "Interior regions of the earth"

• adjective:   situated within or suitable for inside a building

  Example: "An interior scene"

• adjective:   located inward

  Example: "She thinks she has no soul, no interior life, but the truth is that she has no access to it- David Denby"