/əˈblɪvɪən/
the condition or quality of being completely forgotten.
late 14c., oblivioun, « state or fact of forgetting, forgetfulness, loss of memory, » from Old French oblivion (13c.) and directly from Latin oblivionem (nominative oblivio) « forgetfulness; a being forgotten, » from oblivisci (past participle oblitus) « forget, » which is of uncertain origin.