obliviousEnglishOxford Dictionary of Englishoblivious /əˈblɪviəs / ▸ adjective not aware of or concerned about what is happening around one: she became absorbed, oblivious to the passage of time. – DERIVATIVES obliviously /əˈblɪviəsli / adverb obliviousness /əˈblɪviəsnəs / noun– ORIGIN late Middle English: from Latin obliviosus, from oblivio(n-) (see oblivion).