unmindful; unconscious; unaware (usually followed by of or to ): She was oblivious of his admiration.
forgetful; without remembrance or memory: oblivious of my former failure.
Archaic. inducing forgetfulness.

1400–50; late Middle English < Latin oblīviōsus forgetful, equivalent to oblīvī(scī) to for-get + -ōsus -ous

obliviously, adverb
obliviousness, noun
self-oblivious, adjective
semioblivious, adjective
semiobliviously, adverb
semiobliviousness, noun
unoblivious, adjective
unobliviously, adverb
unobliviousness, noun

oblivious, obvious.

2. See absent-minded.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To obliviously
World English Dictionary
oblivious (əˈblɪvɪəs)
adj (foll by to or of)
unaware or forgetful
usage  It was formerly considered incorrect to use oblivious to mean unaware, but this use is now acceptable

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

mid-15c., from L. obliviosus "forgetful, producing forgetfulness," from oblivionem (see oblivion). Meaning "unaware, unconscious (of something)" is from 1862, formerly regarded as erroneous, this is now the general meaning and the word has lost its original sense of "no
longer aware or mindful." Properly should be used with to, not of.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
The days shall come when the year will weep obliviously.
And that condemned food, which my sister grew up obliviously consuming in
  copious amounts, was pumpkin.
If these discernments are not correct, then obliviously a different definition
  is needed.
However, having said that doesn't mean that you may want to dig through it
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