ヘアダイヘアダイMeanings1nounhair dye; hair dyeingRefers to both the product used to color hair and the act of dyeing hair. Common in beauty contexts.新あたらしいヘアダイを買かってきた。I bought a new hair dye.美び容よう院いんでヘアダイをしてもらった。I had my hair dyed at the salon.