Vocabulary What does 清流 (せいりゅう, seiryuu) mean? 清流 (せいりゅう, seiryuu) means clear stream. Quick factsReadingせいりゅうRomajiseiryuuPart of speechnoun 清流せいりゅうseiryuuclear stream1noun clear streamKanji in this word清pure, clean流flow; stream; drift