noun
a cut above; one step above
Used to describe someone or something that is noticeably better or superior in quality, skill, or level compared to others.
彼の料理の腕前は、他のシェフより一段上だ。
His cooking skills are a cut above the other chefs.
この新製品は、前のモデルより一段上の性能を持っている。
This new product has performance that is one step above the previous model.