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English definition of “diamond”

diamond

noun uk   /ˈdaɪə.mənd/ us  

diamond noun (STONE)

B2 [C or U] a transparent, extremely hard precious stone that is used in jewellery, and in industry for cutting hard things: The tiara was set with diamonds and rubies. a diamond ring/necklace He had worked in the diamond mines of South Africa. diamond-tipped saw bladesPrecious and semi-precious stonesTypes of rock diamonds [plural noun] jewellery made from diamonds: Shall I wear the diamonds or the pearls with this dress?Jewellery

diamond noun (SHAPE)

B2 [C or U] a shape with four straight sides of equal length, forming two opposite angles that are wide and two that are narrow: Joe's socks had diamond patterns on them.Geometrical shapesSpherical, circular and annular objects [C] the square part of a field on which baseball is played, surrounded by the four bases, or the whole field on which the game is playedSurfaces on which sports take placeBaseball and roundersGeneral terms used in ball sports

diamond noun (CARDS)

diamonds [plural or U] one of the four suits in playing cards, shown by one or more red symbols in the shape of a diamond: the six/jack of diamonds [C] a playing card from the suit of diamonds: She played a diamond.
(Definition of diamond from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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