Definition that contains holy grail
- galahad (Arthurian legend) the most virtuous knight of the Round Table; was able to see the Holy Grail
- sir galahad (Arthurian legend) the most virtuous knight of the Round Table; was able to see the Holy Grail
- siege perilous the legendary seat at King Arthur's Round Table reserved for the knight who would find the Holy Grail; it was fatal for anyone else to sit in it