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English definition of “grain”

grain

noun [C] (SMALL PIECE/AMOUNT)   /ɡreɪn/
a very small piece of a hard substance, or a small amount of something: grains of sand There was a grain of truth in what she said. You haven’t got a grain of sense.
(Definition of grain noun (SMALL PIECE/AMOUNT) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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