留空 Traditional form: 留空 Pinyin (reading): liúkòng Definitions: to leave blank space in a document to leave some time free Characters: 留 - to stay, to remain; to preserve, to keep; to leave a message; 空 - hollow, empty, deserted, bare Traditional characters: 留 - to stay, to remain; to preserve, to keep; to leave a message; 空 - hollow, empty, deserted, bare