Webster’s Revised Unabridged Dictionary · 1913
Oblivious
Ob·liv′i·ous (·ŭs), a. [L. obliviosus: cf.F. 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.
— Obliv′i·ous·ly, adv. — Ob·liv′i·ous·ness, n. Foxe.