oblivion
nounUK /əˈblɪviən/
US /əˈblɪviən/
Oblivion is when you forget everything, or when something is completely forgotten.
After the long summer, the old rules faded into oblivion.
OTHER MEANINGS
2. A state of being completely unaware of what is happening around you.
He sat in happy oblivion, not noticing the storm outside.
3. The state of being completely destroyed or wiped out.
The ancient city was bombed into oblivion.
4. A place where forgotten things or people are said to go.
Old toys are often sent to oblivion in the attic.