|Origin:||Latin oblivio, from oblivisci 'to forget'|
when something is completely forgotten or no longer important
sink/slip/pass etc into oblivion
Wind power presents too many advantages to be allowed to sink into oblivion.
The loser's name has been consigned to oblivion (=completely forgotten).
the state of being unconscious or of not noticing what is happening:
the oblivion of sleep
He had drunk himself into oblivion.