The Guangyun (Kuang-yun; ) is a Chinese rime dictionary that was compiled from 1007 to 1008 under the auspices of Emperor Zhenzong of Song. Chen Pengnian (, 961–1017) and Qiu Yong were the chief editors. It is a revision and expansion of the influential Qieyun rime dictionary of 601, and was itself later revised as the Jiyun. Until the discovery of an almost complete early 8th century edition of the Qieyun in 1947, the Guangyun was the most accurate available account of the Qieyun phonology, and was heavily used in early work on the reconstruction of Middle Chinese. It is still used as a major source.