The kanji 号 generally conveys the meaning of "number," "unit," "signal," or "title." It often indicates a specific designation or identifier. It can also refer to a specific issue of a publication or a signal used for communication.

・On-yomi (音読み): ゴウ ・Kun-yomi (訓読み): None, but it is often used as a suffix for titles.

⚫︎ 電話番号（でんわばんごう） Translation: Telephone number ⚫︎ 号室（ごうしつ） Translation: Room number ⚫︎ 速報第1号（そくほうだいいちごう） Translation: Flash news No. 1

The kanji 号 is a pictograph. It originally depicted a bugle or a horn used for making a call or a signal. Over time, its meaning expanded to encompass the idea of a numbered designation or a specific unit, reflecting its use in signaling or issuing commands. The top part represents the mouth of the horn, and the bottom part is the horn's body.