Definition of known in English:

known

verb

  • past participle of know

adjective

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

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

Pronunciation

known

/nəʊn/