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oblivious

[uh-bliv-ee-uh s]
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adjective
  1. unmindful; unconscious; unaware (usually followed by of or to): She was oblivious of his admiration.
  2. forgetful; without remembrance or memory: oblivious of my former failure.
  3. Archaic. inducing forgetfulness.

Origin of oblivious

1400–50; late Middle English < Latin oblīviōsus forgetful, equivalent to oblīvī(scī) to for-get + -ōsus -ous
Related formsob·liv·i·ous·ly, adverbob·liv·i·ous·ness, nounself-ob·liv·i·ous, adjectivesem·i·ob·liv·i·ous, adjectivesem·i·ob·liv·i·ous·ly, adverbsem·i·ob·liv·i·ous·ness, nounun·ob·liv·i·ous, adjectiveun·ob·liv·i·ous·ly, adverbun·ob·liv·i·ous·ness, noun
Can be confusedoblivious obvious

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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for unoblivious

oblivious

adjective
  1. (foll by to or of) unaware or forgetful
Derived Formsobliviously, adverbobliviousness, noun

usage

It was formerly considered incorrect to use oblivious to mean unaware, but this use is now acceptable
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for unoblivious

oblivious

adj.

mid-15c., from Latin obliviosus "forgetful, that easily forgets; producing forgetfulness," from oblivion (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. Related: Obliviously; obliviousness.

Online Etymology Dictionary, © 2010 Douglas Harper