noun
EXAMPLES FROM CORPUS
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James in particular, the man earmarked as the lynchpin in the tactical plan, was not living up to expectations.
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Regular brushing is the lynchpin of all good dental hygiene.
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The dollar was the lynchpin of the Bretton Woods system.
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The first of these is the lynchpin of the argument.
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You blag a meeting with the band's lynchpin , organist Clint Boon.