interior |ɪnˈtɪəːrɪə| adjective - situated on or relating to the inside of something; inner: the interior lighting is not adequate. • (interior to) chiefly technical situated further in or within: the layer immediately interior to the epidermis. • (in filming) indoor: interior scenes. noun - the inner part of something; the inside: the interior has been much restored. • an artistic representation of the inside of a building or room: a few still lifes, interiors, and landscapes.