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(uncountable) Rock that is ground more finely than gravel, but is not as fine as silt (more formally, see grain sizes chart), forming beaches and deserts and also used in construction.
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(uncountable, dated) Personal courage.
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(uncountable, geology) A particle from 62.5 microns to 2 mm in diameter, following the Wentworth scale.
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A light beige colour, like that of typical sand.
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(countable, obsolete) A single grain of sand.
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(countable, figurative) A moment or interval of time; the term or extent of one's life (referring to the sand in an hourglass).
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Dried mucus in the eye's inner corner, perhaps left from sleep (sleepy sand).