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English definition of “diamond”

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diamond

noun  /ˈdɑɪ·mənd, -ə·mənd/ us  

diamond noun (STONE)

[C/U] an extremely hard, valuable stone prized as a jewel and having many uses in industry: [U] a diamond engagement ring

diamond noun (SHAPE)

geometry [C] a shape with four straight sides that meet to form two wide and two narrow angles, or a square placed with a corner at the bottom

diamond noun (CARDS)

[pl] one of the four suits (= groups) of playing cards, the symbol for which is a diamond shape
(Definition of diamond from the Cambridge Academic Content Dictionary © Cambridge University Press)
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