柯林斯詞典dan /d?n/ 1. N a small buoy used as a marker at sea 小浮標 (Also called dan buoy)dan /d?n/ N →comparekyu 1. N any one of the 10 black-belt grades of proficiency 段; 競技項目的等級[martial arts] 返回 dan劍橋詞典one of the ten higher levels in judo or karate （空手道或柔道的）段 someone who has achieved one of the ten higher levels in judo or karate （空手道或柔道的）入段選手 返回 dan