meaning of grail
1. A book of offices in the Roman Catholic Church; a gradual.
2. A broad, open dish; a chalice; -- only used of the Holy Grail.
3. Small particles of earth; gravel.
4. One of the small feathers of a hawk.
5. GRAIL Graphical Input Language. A flow chart language entered on a graphics tablet. The graphical follow-on to JOSS. ["The GRAIL Language and Operations", T. O. Ellis et al, RM-6001-ARPA, RAND, Sept 1969].
6. legend chalice used by Christ at the last supper