Definition of "Interior" :

noun: the United States federal department charged with conservation and the development of natural resources; created in 1849

noun: the inner or enclosed surface of something

noun: the region that is inside of something

adjective: of or coming from the middle of a region or country

adjective: inside and toward a center

"Interior regions of the earth."

adjective: located inward

"She thinks she has no soul, no interior life, but the truth is that she has no access to it."

adjective: situated within or suitable for inside a building

"An interior scene."

adjective: inside the country

"The British Home Office has broader responsibilities than the United States Department of the Interior."