oblivion
noun
[ əˈblɪvɪən ]
• the state of being unaware or unconscious of what is happening around one.
• "they drank themselves into oblivion"
Similar:
unconsciousness,
insensibility,
stupor,
stupefaction,
senselessness,
blankness,
darkness,
coma,
blackout,
obliviousness,
unawareness,
ignorance,
amnesia,
the waters of Lethe,
• amnesty or pardon.
Origin:
late Middle English: via Old French from Latin oblivio(n- ), from oblivisci ‘forget’.