What does 大部分 mean?
大部分 is a Japanese noun meaning “most part, majority” in English. It is written as 大部分 in kanji, だいぶぶん in hiragana, and daibubun in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
石炭は大部分が炭素から成っている。
Coal consists mostly of carbon.