Webster 1913 Edition



Fully known; generally known or acknowledged.
A church well known with a
M. Arnold.

Definition 2024



See also: wellknown


Alternative forms

  • well known


well-known (comparative better-known or more well-known, superlative best-known or most well-known)

  1. Familiar, famous, renowned or widely known.
    • 1918, W. B. Maxwell, chapter 15, in The Mirror and the Lamp:
      Edward Churchill still attended to his work in a hopeless mechanical manner like a sleep-walker who walks safely on a well-known round. But his Roman collar galled him, his cossack stifled him, his biretta was as uncomfortable as a merry-andrew's cap and bells.
    • 2013 July-August, Philip J. Bushnell, Solvents, Ethanol, Car Crashes & Tolerance”, in American Scientist:
      Furthermore, this increase in risk is comparable to the risk of death from leukemia after long-term exposure to benzene, another solvent, which has the well-known property of causing this type of cancer.
  2. (computing, not comparable) Generally recognised; reserved for some usual purpose.
    • 1972, Vint Cerf, Jon Postel, RFC 322 - Well known socket numbers
      We would like to catalog other sockets which are supposed to be well-known
    • 2003, John Mueller, .NET development security solutions
      If the call to this function fails, you can assume the SID was invalid — even if it's a well-known SID.
    • 2007, Larry L Peterson, Bruce S Davie, Computer networks: a systems approach
      A common approach is for the server to accept messages at a well-known port.



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