What does 信号 mean?
信号 is a Japanese noun meaning “traffic lights, signal, semaphore” in English. It can also be translated as “traffic light” depending on context. It is written as 信号 in kanji, しんごう in hiragana, and shingou in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
信号が青に変わったわよ。
The traffic light turned green.