Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

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 blades diamonds [plural noun] jewellery made from diamonds: Shall I wear the diamonds or the pearls with this dress?

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. [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 played

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)
What is the pronunciation of diamond?
Add Cambridge dictionaries to your browser to your website

Definitions of “diamond” in other dictionaries

Word of the Day

mutant

an organism that is different from others of its type because of a permanent change in its genes

Word of the Day

What’s that lovely smell?

by Kate Woodford,
October 29, 2014
As adult humans, we can distinguish about 10,000 different smells. It’s no wonder, then, that we have so many words and expressions to describe them. This week we’re taking a look at those smell words – words that describe good smells and words that describe bad smells. Most smell words are either

Read More 

high-frequency trading noun

October 27, 2014
a type of stock market trading that uses very complex technology to trade extremely quickly, often making tiny profits which nevertheless add up to substantial sums Lewis’s book, Flash Boys, is driving a huge amount of attention toward the topic of high frequency trading, and it has rekindled some of

Read More