1An advanced or higher level in skill, study, or rank; also used for a higher social class or status.
半年間の勉強で、ようやく上級クラスに進級できた。
After six months of studying, I finally moved up to the advanced class.
このテキストは上級者向けで、文法がかなり難しい。
This textbook is aimed at advanced learners, and the grammar is quite difficult.
彼は会社の上級職に昇進した。
He was promoted to a senior position at the company.
上級の役人が視察に訪れた。
A senior official came to inspect the site.