pronoun · an interjection expressing surprise, realization, or a question

唵！原来是你呀。

pronoun · the sacred syllable used in Buddhist transliterations and mantras

他正在念诵“唵嘛呢叭咪吽”。

pronoun · to stuff or cram something into one's mouth

他把最后半个馒头往嘴里一唵。