Noun:
1: interior, inside the region that is inside of something
2: interior, inside the inner or enclosed surface of something
3: department of the interior, doi, interior, interior department the United States federal department charged with conservation and the development of natural resources; created in 1849
Adjective:
1: interior, inside, indoor situated within or suitable for inside a building; "an interior scene"; "interior decoration"; "an interior bathroom without windows"
2: domestic, interior, internal, national, home inside the country; "the British Home Office has broader responsibilities than the United States Department of the Interior"; "the nation's internal politics"
3: interior, inner, inward, internal located inward; "Beethoven's manuscript looks like a bloody record of a tremendous inner battle"- Leonard Bernstein; "she thinks she has no soul, no interior life, but the truth is that she has no access to it"- David Denby; "an internal sense of rightousness"- A.R.Gurney,Jr.
4: interior, internal inside and toward a center; "interior regions of the earth"
5: upcountry, midland, inland, interior of or coming from the middle of a region or country; "upcountry districts"