ブルー Common word JLPT N1 LinksSentence search for ブルーEdit in JMdict Noun, Noun which may take the genitive case particle 'no'1. blueあなたはブルーのふく服をき着るととてもすてきだ。You are very attractive in blue.Na-adjective (keiyodoshi)2. sad; down (in the dumps)かのじょ彼女、どうしたの？ちょっとブルーはい入ってるけど。What's wrong with her? She's looking kind of blue. Discussions Log in to talk about this word.