What does 便 mean?
便 is a Japanese noun meaning “way, means; flight” in English. It can also be translated as “mail, opportunity” depending on context. It is written as 便 in kanji, びん in hiragana, and bin in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
ちょっとした事故が原因で、２、３便に遅れが出た。
A couple of flights were delayed on account of a minor accident.