In general, the interior of something refers to the space or part inside of it, excluding any kind of wall or boundary around its outside. Commonly referenced interiors are those of houses and cars. It has different, more specific definitions in different contexts. Geography British Columbia Interior, commonly called "The Interior", the inland areas of British Columbia, Canada, including but not limited to: The Interior Plateau, official name of the parts of British Columbia between the Coast… (More on Interior)