also: あ
interjection
Expresses sudden realization, recollection, or mild surprise. Often used when something comes to mind.
あっ、財布を忘れた。
Ah! I forgot my wallet.
あっ、そういえば明日は休みだ。
Oh, now that you mention it, tomorrow is a holiday.
interjection
Used to get someone's attention, often with a slight sense of urgency or calling out.
あっ、ちょっと待って!
Hey, wait a moment!
Katakana shortened form.
Mixed-kana variant, occasionally seen in informal writing.
A natural exclamation; the exact origin is uncertain, but it is a basic sound-symbolic interjection common across languages.