あっ (A) is a Japanese interjection meaning “ah, oh, hey!”.
Meanings
- interjectionah; ohexpression of surprise, recollection, etc.
- interjectionhey!used to get someone's attention
Examples
あっ、来た来た。
Here he is!
あっ！教えてくれ。
Oh! Show me how.
あっ、彼等が来る。
Oh, here they come!
Sentences from Tatoeba (CC BY 2.0 FR).