ゆうせい 優勢 Common word JLPT N1 LinksSentence search for 優勢Sentence search for ゆうせいKanji details for 優 and 勢Edit in JMdict Noun, Na-adjective (keiyodoshi)1. superiority; superior power; predominance; preponderanceAntonym: 劣勢 Discussions Log in to talk about this word.