Straight; consisting of a straight line or lines; bounded by straight lines; as, a rectineal angle; a rectilinear figure or course.
Characterized by straight lines as opposed to curvilinear which is characterized by curved lines.
characterized by a straight line or lines; "rectilinear patterns in wallpaper"; "the rectilinear propagation of light"
This means “characterized by straight lines”, most notably ones that are at right angles to each other and thus form the familiar 2D or 3D Cartesian coordinate system for the precise mapping of spatial locations.
Formed or enclosed by straight lines to create a rectangle.
Consisting of or bound by straight lines.