a state in which you are not aware of what is happening around you, usually because you are unconscious or asleep (Oxford)
the state in which somebody/something has been forgotten and is no longer famous or important (Oxford)
the state of being completely forgotten (Cambridge)
He often drinks himself into oblivion. (Oxford)
An unexpected victory saved him from political oblivion. (Oxford)
He was another minor poet who was consigned to oblivion. (Cambridge)
drinks oneself into oblivion
political oblivion
consigned to oblivion
Forgetfulness
Unawareness
Consciousness
Awareness
Oblivious