[1] : The Collaborative International Dictionary of English v.0.48

grail \grail\, n. of. graal, greal, greet, f. graal, gr'eal,
   ll. gradalis, gradale, prob. derived fr. l. crater bowl,
   mixing vessel, gr. krath`r. see crater.
   a broad, open dish; a chalice; -- only used of the holy
   grail.
   1913 webster

   note: the holy grail, according to some legends of the middle
         ages, was the cup used by our savior in dispensing the
         wine at the last supper; and according to others, the
         platter on which the paschal lamb was served at the
         last passover observed by our lord. this cup, according
         to the legend, if appoached by any but a perfectly pure
         and holy person, would be borne away and vanish from
         the sight. the quest of the holy grail was to be
         undertaken only by a knight who was perfectly chaste in
         thought, word, and act.
         1913 webster
see also:
crater. holy grail 

[2] : The Collaborative International Dictionary of English v.0.48

grail \grail\, n. f. gr^ele hail, from gr'es grit, ohg.
   griex, grioz, g. gries, gravel, grit. see grit.
   small particles of earth; gravel. obs.
   1913 webster

         lying down upon the sandy grail.         --spenser.
   1913 webster
see also:
grit. 

[3] : The Collaborative International Dictionary of English v.0.48

grail \grail\ gr=al, n. cf. of. graite slender, f.
   gr^ete.
   one of the small feathers of a hawk.
   1913 webster

[4] : The Collaborative International Dictionary of English v.0.48

grail \grail\, n. of. greel, ll. gradale. see gradual, n.
   a book of offices in the roman catholic church; a gradual.
   obs. --t. warton.
   1913 webster

         such as antiphonals, missals, grails, processionals,
         etc.                                     --strype.
   1913 webster
see also:
gradual 

[5] : WordNet (r) 2.0

grail
     n : legend chalice used by christ at the last supper syn: holy
         grail, sangraal
see also:
holy grail sangraal 

[6] : The Free On-line Dictionary of Computing (27 SEP 03)

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.
     
        1995-01-23
     
     
see also:
flow chart joss 

Grail >> G Words
Grail, definition of term: Grail
grail_pag1.html

Holy Grail >> H Words
Holy Grail, definition of term: Holy Grail
holy+grail_pag1.html