Meaning of “diamond” in the English Dictionary

"diamond" in British English

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uk /ˈdaɪə.mənd/ us /ˈdaɪ.ə.mənd/ /ˈdaɪ.mənd/

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 blades
diamonds [ plural noun ]

jewellery made from diamonds:

Shall I wear the diamonds or the pearls with this dress?

More examples

  • The large central diamond is surrounded by eight smaller stones.
  • His father struck it rich in the diamond business.
  • He gave her a hugely expensive diamond ring.
  • It was a beautiful necklace with a diamond pendant.
  • A large diamond glinted on her finger.

(Definition of “diamond” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"diamond" in American English

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us /ˈdɑɪ·mənd, -ə·mənd/

diamond noun (STONE)

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

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)