Vocabulary What does あ (a) mean? あ means ah, oh (interjection). Quick factsReadingあRomajiaLevel (estimated, JLPT framework)N4 ああN4 · estimated, JLPT frameworkaah, oh (interjection)Example sentencesあ、財布(さいふ)を忘(わす)れました。Oh, I forgot my wallet.あ、電車(でんしゃ)が来(き)ましたよ。Oh, the train has arrived!