What does 号 mean?
号 is a Japanese noun meaning “number; edition; make; model” in English. It can also be translated as “sobriquet, size (of printing types, canvases, knitting needles, etc.), suffix attached to names of ships, trains, airplanes, etc.” depending on context. It is written as 号 in kanji, ごう in hiragana, and gou in romaji. This word is part of JLPT N4 vocabulary.
Example sentence
あなたの定期購読予約は六月号で切れます。
Your subscription expires with the June issue.