What does 発 mean?
発 is a Japanese verb meaning “to depart (e.g., on a plane, train)” in English. It can also be translated as “sent from ..., counter for engines (on an aircraft), counter for gunshots, bursts of gas, etc.” depending on context. It is written as 発 in kanji, はつ in hiragana, and hatsu in romaji. This word is part of JLPT N2 vocabulary.
Example sentences
６時発のニューヨーク行きの列車に乗りたいのです。
I want to catch the six o'clock train to New York.
彼は３発撃った。
He fired three shots.