In Welsh legend, Arthur's sword is known as "Caliburn", which is thought by some to be a corruption of the name "Caledvwlch", a magic sword in the Mabinogion. Geoffrey of Monmouth also calls Arthur's sword "Caliburn" in his "History of the Kings of Britain", and it is thought that the name Excalibur is a corruption of this usage. Sir Thomas Malory says that Caliburn was the original name; when Caliburn was broken, it was re-forged into the sword and the new name Excalibur was bestowed upon it. However, the name is also close to the Latin phrase for 'out of the stone'.
In the later versions of the legend, Excalibur's scabbard has the magical power to protect its bearer from harm (and to prevent the bearer from suffering further harm from wounds he might already have received). It is the theft of the scabbard by Morgan Le Fay that leads to Arthur's eventual death.
Excalibur is a 1981 film directed by John Boorman concerning the legend of King Arthur.
Excalibur was a comic book series published by Marvel Comics about a superhero team led by Captain Britain.