空集合 くうしゅうごう Meanings Noun empty set Kanji 空 sky. Read as クウ. 集 gather. Read as シュウ. 合 fit. Read as ゴウ. Example sentences 何も元を持たない集合は空集合と呼ばれ、{}と表される。The set without any elements is called the empty set and is denoted by {}. Word lists Mathematics Jinuma: Japanese Dictionary · Word lists