noun
open-weight division; unclassified division
Used in combat sports and weightlifting for a category without weight limits.
柔道の無差別級では、体重に関係なく試合が行われる。
In judo's open-weight division, matches are held regardless of body weight.
Means 'indiscriminate' or 'without distinction'; 無差別級 specifically refers to a weight class without limits.
Compound of 無差別 (indiscriminate, without distinction) and 級 (class, rank).