オーノーMeanings1interjectionoh no!A direct borrowing of the English interjection, used in Japanese to express dismay, shock, or regret, often in a lighthearted or dramatic way.オーノー、財さい布ふを忘わすれた!Oh no, I forgot my wallet!オーノー、また雨あめだ。Oh no, it's raining again.