doublelined

Doublelined is an adjective used to describe objects, markings, or designs that feature two parallel lines. The term can apply to physical forms such as seams, borders, or road markings, as well as to printed or digital graphics where two lines are used to frame or emphasize content.

In typography and graphic design, doublelined refers to elements such as double borders, double rules, or a double underline—two parallel strokes used for emphasis or separation. It can also describe a design motif where two parallel lines run along or around a shape.

In road markings, double-lined patterns appear as two parallel lines painted on roadways. The meaning varies by jurisdiction: some double solid lines prohibit crossing, while a solid line paired with a dashed line on the opposite side permits passing when safe. Double lines in this context are used to regulate traffic flow and improve safety by clarifying when lane changes are allowed.

In textiles and garment construction, doublelined seams or hems are reinforced by two parallel rows of stitching, improving durability and visual detail. This technique is common in areas subject to stress or wear, such as hems, pockets, and edges of heavy fabrics.

In maps, diagrams, or technical drawings, double lines may indicate a boundary, an edge, or a dual feature such as a reinforced border or a nearby parallel feature. The exact interpretation depends on the standards of the field and the conventions of the institution or country producing the drawing.