Grail

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++Grail /ɡreɪl/ noun  nHoly Grail noun   a) TRY TO DO OR GET something[singular] something that people want very much, but which is very difficult or impossible to achieveHoly Grail of Nuclear fusion is the Holy Grail of energy production.b) → the Holy Grail

Examples from the Corpus

Grail• That was my Holy Grail, and there could be no real life for me until I found it.• Another generation of Labour leaders, in the 1960s, were still left to search for the Holy Grail of economic planning.• We may remember here that the Holy Grail is sometimes considered to be a stone, as well as a vessel.• What if there is no Grail or Excalibur or secret Templars?• From the same lands came the quest for the Grail that revivified the spirituality of the twelfth century.• Secondly, Buckingham wanted those relics, the Grail and Excalibur.• Odile is the patroness of the knights who sought the Grail.Origin Grail (1300-1400) Old French grael, from Medieval Latin gradalis “dish”

Grail nounLDOCE Online  

very which much, people very is something want that Corpus but

Grail
Grail /ɡreɪl/ noun⇨ Holy Grail

grailBrE /ɡreɪl/ 🔊NAmE /ɡreɪl/ 🔊 (also the ˌHoly ˈGrail) noun [singular] the cup or bowl believed to have been used by Jesus Christ before he died, that became a holy thing that people wanted to find 圣杯（据信为耶稣离世前所用） [countable] a thing that you try very hard to find or achieve, but never will 渴望但永远得不到的东西；努力追求但永远不可能实现的目标（或理想）