obliviouso‧bliv‧i‧ous /əˈblɪviəs/ adjective [not before noun] 
He seemed oblivious to the fact that he had hurt her.seemingly/apparently oblivious Congress was seemingly oblivious to these events.—obliviousness noun [uncountable]
EXAMPLES FROM OTHER DICTIONARIES
- In the sitcom she plays a New York executive who's totally oblivious to the feelings of others.
- The walkers in front crossed the ledge easily, seemingly oblivious to the fact that there was a 3000 foot drop on either side.
- They soon fell asleep, oblivious of the danger.
- For here lay no more than a piece of meat, oblivious, inanimate, an object to be examined without reverence.
- He ate on, oblivious to the storms he was stirring into the air around him.
- He worked as a man obsessed, oblivious to family and friends, shunning holidays, forgetting anniversaries.
- It is extraordinary how oblivious the Labour party remains to the extraordinarily damaging consequences of its proposals.
- Luckily, Theresa was oblivious to the offering.
- Most constant complainers are oblivious to their annoying habit, Vilas said.
- Senses rioted, coherent thought fled, and for mindless seconds they were oblivious to the world about them.
- She seemed quite oblivious to the route I was taking as she chatted on about her holiday plans for Ibiza.
Longman Language Activatorto not realize what is happening
· "It's my birthday today." "Oh, I didn't realize. I should have bought you a card."not know/not realize/have no idea (that) · I wish I'd brought my coat. I didn't know it would be so cold.· We didn't realize that he had quit, until he didn't show up at work that day.not know/not realize/have no idea what/how/where etc · My wife and I had no idea how much we would depend upon Social Security in the future.
formal to not know about a situation or about something that is happening, especially when you should know about it: be unaware/not be aware of: · The child was clearly unaware of the danger.· If any bad feelings existed between the two of them, I was not aware of it.be unaware/not be aware that: · His parents weren't even aware that he smoked.
formal to know nothing about a subject or situation because you have not experienced it, read about it, or heard about it: · The general public has little or no knowledge of what is happening inside prisons.· The State Department said it had no knowledge of any threats to U.S. security.
also unbeknownst to somebody use this about something that was happening without you knowing about it at the time: · Unbeknown to me, Denise had her own plan.· Unbeknownst to the public, he was involved in covering up the scandal that was to rock the nation.
use this when you did not know or imagine that something was true or would happen: little did I/she/he etc know that: · Little did she know that this picture would one day be worth more than a million dollars.· Little did I know then that I would be working in Los Angeles 35 years later.
spoken say this when you know almost nothing about a situation and to suggest something that might have happened or be true, especially something unlikely: · They may have gone to South America, for all we know.· You shouldn't have accepted a ride from him. For all you knew he might have been a mass murderer.
if you are unconscious of the effect of something that you have said or done, you do not realize how it affects other people: · She appeared to be unconscious of the amusement she had caused by her remarks.· Like many tourists they were unconscious of the fact that they had deeply offended their hosts.
someone who is oblivious to what is happening around them does not notice it and continues to do other things without being affected by it: oblivious of: · They soon fell asleep, oblivious of the danger.oblivious to: · The walkers in front crossed the ledge easily, seemingly oblivious to the fact that there was a 3000 foot drop on either side.· In the sitcom she plays a New York executive who's totally oblivious to the feelings of others.
COLLOCATIONS FROM THE ENTRY Congress was seemingly oblivious to these events.COLLOCATIONS FROM OTHER ENTRIES
not knowing about or not noticing something that is happening around you SYN unawareoblivious of/to Congress was seemingly oblivious to these events. (=seeming not to notice something)· She was seemingly unaware of all the activity around her.
COLLOCATIONS FROM THE CORPUSADVERB· He was reading a newspaper, apparently oblivious to the contribution he was making to the traffic chaos.· Jean Vilbrun Guillaume Sam sat at his desk, head in hands, apparently oblivious to the events outside.· He was lighting another cigarette, apparently oblivious of the elements.
· How could a self-styled poet be so oblivious to taste?
He seemed oblivious to the fact that he had hurt her.seemingly/apparently oblivious Congress was seemingly oblivious to these events.—obliviousness noun [uncountable]