Chou Collection, Lower Volume Radical: Big (dà) Di Page 250, Entry 20 According to the Extensive Rhymes (Guangyun), Collected Rhymes (Jiyun), and Collection of Rhymes (Yunhui), the pronunciation is di (level tone). It means big. Also, according to the Collected Rhymes (Jiyun), the pronunciation is di (rising tone). It is also pronounced di (falling tone). The meanings are the same.