(Arthurian legend) wife of King Arthur; in some versions of the legend she became Lancelot's lover and that led to the end of the Knights of the Round Table

Guinevere was the legendary queen consort of King Arthur. The name Guinevere may be an epithet—the Welsh form Gwenhwyfar can be translated The White Fay or White Ghost (Proto-Celtic *vindo-siabraid "white phantom", Brythonic *vino-hibirā; see also Ishara). Additionally, the name may derive from "Gwenhwy-mawr" or Gwenhwy the Great, contrasting the character to "Gwenhwy-fach" or Gwenhwy the less; Gwenhwyfach appears in Welsh literature as a sister of Gwenhwyfar, but in her scholarly edition of the Welsh Triads, Rachel Bromwich suggests this is a less like etymology.

Guinevere is a TV movie, a take off on the usual Arthurian cycle, but from Guinevere's point of view, presenting her as the driving force behind the success of Camelot. As a feminist send off of the Arthurian saga, related to The Mists of Avalon. It was based on the Persia Woolly novels Child of the Northern Spring, Queen of the Summer Stars, and Legends Decked in Autumn Gold.

Guinevere is an e-mail filtering program that is built for use with the Group Wise e-mail system. It is one of several third-party products for GroupWise written by Michael Bell now of GWAVA, Inc.

Guinevere is a 1999 motion picture about the artistic and romantic relationship between a young student and her older mentor.