宇航 yǔháng space flight Origin Definitions Defs Strokes Stroke Words Sentences Sents 宇 yǔ noun abbreviation of 宇宙 yǔzhòu universe the universe; cosmos; all existing matter and space considered as a whole航 háng verb abbreviation of 航行 hángxíng to sail or fly to navigate; to sail a boat or ship on or under water; to fly a plane or other aircraft through the air or space