Definition from Wiktionary, the free dictionary
Generally considered to be a compound of onomatopoeia ぼ + adverbial particle と. Extension of shorter version ぼっと, emphasizing an extended ongoing state of mental or visual fuzziness, vagueness, or indistinctness.
ぼうっと (romaji bōtto)
- Unclearly, indistinctly, vaguely.
- The sound of a fire burning strongly.
- By extension, indicating that someone's face is flushing red: blushingly.