くうこう 空孔 LinksSentence search for 空孔Sentence search for くうこうKanji details for 空 and 孔Edit in JMdict Noun1. (electron) holePhysics, See also 正孔Noun2. (lattice) vacancy; voidCrystallography, See also 原子空孔 Discussions Log in to talk about this word.