diamond

noun, often attributive
di·​a·​mond | \ ˈdī-(ə-)mənd How to pronounce diamond (audio) \

Definition of diamond

 (Entry 1 of 4)

1a : native crystalline carbon that is the hardest known mineral, that is usually nearly colorless, that when transparent and free from flaws is highly valued as a precious stone, and that is used industrially especially as an abrasive also : a piece of this substance
b : crystallized carbon produced artificially
2 : something that resembles a diamond (as in brilliance, value, or fine quality)
3 : a square or rhombus-shaped figure usually oriented with the long diagonal vertical
4a : a playing card marked with a stylized figure of a red diamond
b diamonds plural in form but singular or plural in construction : the suit comprising cards marked with diamonds
5 : a baseball infield also : the entire playing field

diamond

verb
diamonded; diamonding; diamonds

Definition of diamond (Entry 2 of 4)

transitive verb

: to adorn with or as if with diamonds

diamond

adjective

Definition of diamond (Entry 3 of 4)

: of, relating to, or being a 60th or 75th anniversary or its celebration diamond jubilee

Diamond

biographical name
Di·​a·​mond | \ ˈdī-(ə-)mənd How to pronounce Diamond (audio) \

Definition of Diamond (Entry 4 of 4)

Peter A(rthur) 1940–     American economist

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Did You Know?

The largest uncut diamond ever found on earth was the 3,106-carat Cullinan diamond. It was mined in South Africa in 1905 and cut to form the 530-carat “Star of Africa,” which is now part of the British Crown Jewels. But that is nothing compared with the biggest in the known universe. In 2004 American astronomers discovered a diamond 2,500 miles (4,000 km) wide, weighing 10 billion trillion trillion carats, at the heart of a white dwarf star eight light years away in the constellation Centaurus. The star is unofficially known as Lucy, after the Beatles song “Lucy in the Sky with Diamonds.”

Examples of diamond in a Sentence

Noun a necklace studded with diamonds and rubies The ruby was surrounded by a ring of diamond. The children cut the fabric into diamonds. one heart, two diamonds, and two clubs He played the queen of diamonds. Adjective the celebration of Queen Victoria's diamond jubilee in 1897
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Recent Examples on the Web: Noun Two teams who have seen better days will take the diamond on Tuesday in an effort to save face when the Boston Red Sox visit the Toronto Blue Jays on Tuesday, September 10 at 4:07 p.m. Tim Brown, oregonlive, "Boston Red Sox vs Toronto Blue Jays: Live updates, score, TV channel, how to watch live stream online," 10 Sep. 2019 Two shaggy, dirty prospectors showed up in a San Francisco bank one foggy morning with a pouch of raw diamonds. Tom Noel, The Know, "16 strange, spooky and (mostly) true Colorado stories to tell around a campfire," 24 Aug. 2019 In one scam said to have been perpetrated by the men, a Japanese woman sent her online love interest -- really a scammer -- several payments to help him smuggle a bag of diamonds out of Syria. Aj Willingham, CNN, "5 things to know for August 23: Overstock CEO, G7, Japan-South Korea, romance scams," 23 Aug. 2019 At the Monday bail hearing, prosecutors told U.S. District Judge Richard Berman that, in addition to the passport, federal agents found piles of cash and dozens of diamonds inside a safe in his townhouse. NBC News, "Jeffrey Epstein's lawyers: He had a doctored passport to ward off hijackers, terrorists," 16 July 2019 Beyoncé walked the red carpet for the film premiere literally dripping in diamonds while all this news was unfolding around her: View this post on Instagram A post shared by Beyoncé (@beyonce) on Jul 10, 2019 at 1:18am PDT Bow down, everybody. Katherine J. Igoe, Marie Claire, "Beyoncé's New, Original 'Lion King' Song Is the Power Anthem of 2019," 10 July 2019 The trio of diamonds is as meaningful as the stones are magnificent. Erin Jensen, USA TODAY, "Duchess Meghan changed her engagement ring and we didn't even notice," 24 June 2019 The singer has not been afraid to change up her makeup or hair routine, debuting unicorn hair, a short pixie cut, and even a makeover made of diamonds. Zoë Weiner, Teen Vogue, "Cardi B Was Named Star of the Year by “People en Español”," 30 Oct. 2018 Kate Middleton looked like the definition of a princess tonight wearing an Alexander McQueen gown and tons of diamonds to a state dinner at Buckingham Palace. Caroline Picard, Good Housekeeping, "The First Photos of Kate Middleton Wearing an Special Honor From the Queen Are Breathtaking," 24 Oct. 2018 Recent Examples on the Web: Verb Instead, they were drawn to the idea that diamonds represent authenticity. Andrew E. Kramer, New York Times, "A Diamond Giant Plays Up Its Russian Ties to Appeal to Americans," 11 July 2018 The Del Paso Youth Baseball league has not used the Johnston Park diamonds in two years, according to a staff report. Anita Chabria, sacbee, "Sacramento homeless: Tent city proposed for Johnston Park in north Sacramento | The Sacramento Bee," 24 Apr. 2017 They are accused of burglarizing Tustin Village Jewelers, Diamonds Direct in Laguna Hills, Nick’s Jewelry and Watch Craft in Fullerton and Mimi’s Jewelry and Ballard and Ballard Jewelry in Fountain Valley. Orange County Register, "Man gets 2 years for 5 Orange County jewelry store burglaries," 20 Jan. 2017 Recent Examples on the Web: Adjective Diamond experts say the gem could be the 10th-largest ever discovered and initially pegged its value at $50 million. Alpha Kamara, USA TODAY, "Sierra Leone mystery: What is whopping 709-carat diamond worth?," 4 July 2017 Diamond’s facility in the county is Pump Station #1 in San Diego, where large-scale waterfalls help dilute the wastewater entering the treatment plant. Kristina Davis, sandiegouniontribune.com, "San Marcos company admits illegally dumping wastewater from portable toilets," 3 June 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'diamond.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of diamond

Noun

14th century, in the meaning defined at sense 1a

Verb

1751, in the meaning defined above

Adjective

1872, in the meaning defined above

History and Etymology for diamond

Noun

Middle English diamaunde, from Middle French diamand, from Late Latin diamant-, diamas, alteration of Latin adamant-, adamas hardest metal, diamond, from Greek

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Statistics for diamond

Last Updated

2 Nov 2019

Time Traveler for diamond

The first known use of diamond was in the 14th century

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More Definitions for diamond

diamond

noun
How to pronounce Diamond (audio)

English Language Learners Definition of diamond

 (Entry 1 of 2)

: a very hard usually colorless stone that is a form of carbon and is used especially in jewelry
: a shape that is formed by four equal straight lines and that has two opposite angles that are smaller than a right angle and two opposite angles that are larger than a right angle
: a playing card that is marked with a red diamond shape

diamond

adjective

English Language Learners Definition of diamond (Entry 2 of 2)

: of or relating to the 60th or 75th anniversary of an important event (such as a marriage)

diamond

noun
di·​a·​mond | \ ˈdī-ə-mənd How to pronounce diamond (audio) , ˈdī-mənd\

Kids Definition of diamond

1 : a very hard mineral that is a form of carbon, is usually nearly colorless, and is used especially in jewelry
2 : a flat figure ◊ like one of the surfaces of certain cut diamonds

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Comments on diamond

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