What does 青 mean?
青 is a Japanese noun meaning “blue (the colour)” in English. It can also be translated as “green, green light” depending on context. It is written as 青 in kanji, あお in hiragana, and ao in romaji. This word is part of JLPT N5 vocabulary.
Example sentence
信号が青に変わったわよ。
The traffic light turned green.