Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Language: Old French
Origin: Latin oblivio, from oblivisci 'to forget'

oblivion

noun
     
o‧bliv‧i‧on [uncountable]
1 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).
2 the state of being unconscious or of not noticing what is happening:
the oblivion of sleep
He had drunk himself into oblivion.

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