Webster's Revised Unabridged Dictionary · 1913

Oblivious

Oblivious , adjective

[Latin obliviosus: compare French oblivieux.]

1.
Promoting oblivion; causing forgetfulness.
The oblivious pool. — Milton
She lay in deep, oblivious slumber. — Longfellow
2.
Evincing oblivion; forgetful.
Through are both weak in body and oblivious. — Latimer