A braid is a complex structure or pattern formed by interlacing three or more strands of flexible material such as textile yarns, wire, or hair. The simplest and most common version is a flat, solid, three-stranded structure. More complex patterns can be constructed from an arbitrary number of strands to create a wider range of structures. The structure is usually long and narrow with each component strand functionally equivalent in zigzagging forward through the overlapping mass of the others. It can be compared with the process of weaving, which usually involves two separate perpendicular groups of strands.

Kumihimo is a traditional Japanese artform of making braids and cords. In the past, kumihimo decorations were used as accessories for kimono as well as samurai armor. Literally meaning "gathered threads", kumihimo are made by interlacing reels of yarn, commonly silk, with the use of traditional, specialised looms – either a marudai or a takadai (高台).