noun
EXAMPLES FROM OTHER ENTRIES
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A vaccine for malaria has become something of a scientific holy grail .
EXAMPLES FROM CORPUS
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Another generation of Labour leaders, in the 1960s, were still left to search for the Holy Grail of economic planning.
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That was my Holy Grail , and there could be no real life for me until I found it.
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The plot proper, however, is the Big One - a quest for the Holy Grail .
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Total immunity from colds once seemed to be the unattainable Holy Grail of clinical viral science.
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We may remember here that the Holy Grail is sometimes considered to be a stone, as well as a vessel.