1. 无意识状态;沉睡;昏迷
Oblivion is the state of not being aware of what is happening around you, for example because you are asleep or unconscious.
e.g. He just drank himself into oblivion...
他喝得完全不省人事。
e.g. Within the hour he had slipped once again into deep and dreamless oblivion.
不出一小时,他再次陷入了无梦的沉睡。
2. 被遗忘的状态;湮没
Oblivion is the state of having been forgotten or of no longer being considered important.
e.g. It seems that the so-called new theory is likely to sink into oblivion.
这所谓的新理论看来将很可能被人淡忘。
3. 被摧毁;被毁灭;被夷为平地
If you say that something is bombed or blasted into oblivion, you are emphasizing that it is completely destroyed.
e.g. An entire poor section of town was bombed into oblivion.
城市的一整片贫民区被炸为了平地。