流行 Traditional form: 流行 Pinyin (reading): liúxíng Definitions: (of a contagious disease etc) to spread to propagate (of a style of clothing, song etc) popular fashionable Characters: 流 - to flow, to drift, to circulate; class 行 - to go, to walk, to move; professional Traditional characters: 流 - to flow, to drift, to circulate; class 行 - to go, to walk, to move; professional