What does 上下 mean?
上下 is a Japanese noun meaning “high and low, up and down” in English. It can also be translated as “going up and down, going and coming back, upper and lower classes” depending on context. It is written as 上下 in kanji, じょうげ in hiragana, and jouge in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
彼は旗を上下に動かした。
He moved the flags up and down.