well-known

adj

Etymology: From Middle English well knowen. By surface analysis, well + known.

1. Familiar, famous, renowned, noted or widely known.

   “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.”

   “There are a number of diseases that are considered to be universally fatal. AIDS and rabies encephalitis are well-known examples.”

2. Generally recognized; reserved for some usual purpose.

   “We would like to catalog other sockets which are supposed to be well-known”

   “If the call to this function fails, you can assume the SID was invalid — even if it's a well-known SID.”