Co je interior? Co je interior? Of, relating to, or located on the inside; inner.Of or relating to one's mental or spiritual being: "She thinks she has no soul, no interior life, but the truth is that she has no access to it” ( David Denby). Situated away from a coast or border; inland. The internal portion or area.One's mental or spiritual life.The inland part of a political or geographic entity.The internal affairs of a country or nation.A representation of the inside of a building or room, as in a photograph.