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English definition of “stone”

stone

noun [C/U] (HARD SUBSTANCE)   /stoʊn/
the hard, solid substance found in the ground that is often used as a building material, or a small piece of this substance: [U] The museum was made of stone. A stone is also a jewel: [C] He wore a ring with a black stone on his little finger. A stone is also a piece of hard material that can form in an organ in the body: [C] kidney stones
(Definition of stone noun (HARD SUBSTANCE) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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