in a way that shows that you are not aware of something, especially what is happening around you

Distracted drivers chatting obliviously on a phone risk everyone's lives. 分心的司机忘乎所以地用手机聊天会危及每个人的生命。

He wandered out of the bar and obliviously walked the streets. 他走出酒吧，不知不觉地走到了街上。