上級 (Joukyuu) is a Japanese noun meaning “upper level, upper grade, high rank, advanced level”.
Meanings
- noun, adjectival nounupper level; upper grade; high rank; advanced level; senior level; upper class
Examples
この辞書は初級者に、いやそれどころか上級者にも役に立つ。
This dictionary is useful to beginners, yes, and to advanced learners.
上級者が英語力（特に読解力）をつけたければ、語彙を増やすのが王道ですね。
If the more advanced want to improve English ability (especially reading comprehension) increasing vocabulary is the way to go.
例えば、私は、来年進学する大学の単位が実際にもらえる数学の上級クラスにいます。
For example, I am in a high-level math class that actually gives me college credits for next year.
Sentences from Tatoeba (CC BY 2.0 FR).