Which of the following is not a traditional martial arts uniform?

The term "Kumite" refers to a practice or sparring format in martial arts, particularly in disciplines like karate, rather than a type of uniform. It denotes a specific training method where practitioners engage in controlled fighting to apply techniques they've learned.

In contrast, the other terms refer to traditional uniforms worn in various martial arts. A "Gi" is the common attire for practitioners of Japanese martial arts, while "Dobok" is the traditional uniform for Korean martial arts like taekwondo. "Keikogi" is another term used for martial arts uniforms, primarily in Japanese martial arts, and is synonymous with "Gi."

Therefore, among the options provided, Kumite stands out as it is not a uniform but rather a method of practice within martial arts.