What does 万 mean?
万 is a Japanese noun meaning “ten thousand (the unit)” in English. It can also be translated as “myriad, all” depending on context. It is written as 万 in kanji, まん in hiragana, and man in romaji. This word is part of JLPT N5 vocabulary.
Example sentence
４０万ガロンの石油がパイプラインから溢れ出た。
400,000 gallons of oil have spilled out of the pipeline.