[greyl] 
| 1. | (usually initial capital letter ) Also called Holy Grail. a cup or chalice that in medieval legend was associated with unusual powers, esp. the regeneration of life and, later, Christian purity, and was much sought after by medieval knights: identified with the cup used at the Last Supper and given to Joseph of Arimathea. |
| 2. | (sometimes initial capital letter) Informal. any greatly desired and sought-after objective; ultimate ideal or reward. |
| grail (grāl) n.
[Middle English greal, from Old French graal, from Medieval Latin gradālis, flat dish.] |
| Holy Grail n. See grail. |