開集 Save Sign in to save words Simplified: 开集 kāijí ㄎㄞ ㄐㄧˊ open set (math.) Character by character 開(kāi)open 集(jí)gather Other words read kāijí kaiji with other tones 開機 開霽 A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0