Definition of known in US English:

known

  • past participle of know

adjective

  • 1Recognized, familiar, or within the scope of knowledge.

    ‘the known world’
    ‘bivalved crustaceans little known to nonprofessionals’
    • ‘The last known fact about her life is that she was picked up by a man from the Biltmore hotel.’
    • ‘Police said he had no known reason for disappearing and appealed for more information.’
    • ‘There is no known vaccine but early treatment with antibiotics has been beneficial.’
    • ‘The court was closed for the weekend and the amount of damage inside the building was not known.’
    • ‘However in those days people had only a vague concept of place outside their known world.’
    • ‘Ricin has no known antidote, and a thousandth of a gram is enough to kill an adult.’
    • ‘It is not known when and if he will return and whether he will again take to the airwaves.’
    • ‘He had no known connections here and his family say they do not know why or when he decided to change his name.’
    • ‘The joy of recognition is rather that more becomes known than is already known.’
    • ‘He left no known diary, he had no known confidantes, other than his wife Mira Markovic.’
    • ‘What industry would benefit from a large database of known working email addresses?’
    • ‘But if justice is ever to be seen to be done then all the known facts have to be investigated.’
    • ‘The seeds are crushed into a powder and there is no known antidote for the fatal solution.’
    • ‘There is no known mutation of the virus to a state that would allow transmission between people.’
    • ‘It isn't often that anyone else in the known universe sides with me in an argument.’
    • ‘Even if they come from a known source, that's no reason to suppose they are harmless.’
    • ‘This means that important calls from known people can always be identified as such.’
    • ‘Raids on known facilities have already been conducted and they have been destroyed.’
    • ‘Radiation is a known cause of the disease which genetically alters white blood cells.’
    familiar, known about, well known
    View synonyms
    1. 1.1attributive Publicly acknowledged to be.
      ‘a known criminal’
      • ‘The rest of the known conspirators were hunted down or died while resisting arrest.’
      • ‘Police also spoke to a known criminal in Fife who was said to be willing to kill for money.’
      • ‘Mr Burgess was a known heroin addict in the town who had a string of criminal convictions.’
      • ‘As so often with these cases, the trial of Bargh revealed he was a known sex offender.’
      • ‘I now have email filters set up to extract and delete email from known offenders.’
      • ‘The area is a known meeting point for men and police are concerned that this was a homophobic attack.’
      • ‘For some, they were too weak since they failed to resolve all of the known paradoxes.’
      recognized, well known, widely known, generally known, publicly known, noted, celebrated, notable, notorious
      View synonyms
    2. 1.2Mathematics (of a quantity or variable) having a value that can be stated.
      • ‘There have been no major changes since last season, so we are dealing with a known quantity.’
      • ‘If the ratio of the two parts of a given number is known, then each of them can be found.’
      • ‘The mass of Pluto is now known accurately since a satellite Charon has been discovered.’

Pronunciation

known

/nōn//noʊn/