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di
diprepositionfrom; of: used in Italian personal names, originally to indicate place of origin.
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Di
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DI
DIDepartment of the Interior.
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di-
di-a prefix occurring in loanwords from Greek, where it meant “two,” “twice,” “double” (diphthong ); on this model, freely used in the formation of compound words (dicotyledon; dipolar ) and in chemical terms (diatomic; disulfide ).
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di.
di.abbreviationdiameter.
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di–
di–A prefix that means “two,” “twice,” or “double.” It is used commonly in chemistry, as in dioxide, a compound having two oxygen atoms.
di
1 Americanpreposition
noun
noun
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Department of the Interior.
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drill instructor.
abbreviation
combining form
symbol
prefix
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twice; two; double
dicotyledon
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containing two specified atoms or groups of atoms
dimethyl ether
carbon dioxide
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a nontechnical equivalent of bi- 1
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abbreviation
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Defence Intelligence
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Detective Inspector
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Donor Insemination
Etymology
Origin of di1
< Italian < Latin dē
Origin of di2
Perhaps alteration of do 2
Origin of di-6
Middle English ≪ Latin < Greek, combining form representing dís twice, double, akin to dýo two. See bi- 1, twi-
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
The new findings, published in the Journal of Geophysical Research -- Solid Earth, were developed in collaboration with Anna Rosa Corsaro of the Istituto Nazionale di Geofisica e Vulcanologia in Catania.
From Science Daily ● Jul. 10, 2026
Still, Luca di Montezemolo, Ferrari’s former chairman, told reporters on Tuesday that the automaker is “risking the destruction of a legend.”
From Los Angeles Times ● May 27, 2026
“If I say what I think, I’d cause harm to Ferrari. We’re risking the destruction of an icon,” former Chairman Luca di Montezemolo said to local media.
From The Wall Street Journal ● May 26, 2026
He has also worked as music director of the Orchestre de Paris, the Accademia Nazionale di Santa Cecilia in Rome, and the Swedish Radio Symphony Orchestra.
From BBC ● May 26, 2026
He had a hard time imagining Nico di Angelo acting out of love for anybody, except maybe Hazel.
From "The House of Hades" by Rick Riordan
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XS.com’s Antonio Di Giacomo expects gold prices to increase gradually from a technical perspective, as long as it maintains above $4,000 a troy ounce, with $4,100 as the immediate resistance level.
From The Wall Street Journal ● Jul. 22, 2026
"We're not in a drought situation yet, but at this rate, there's less than three weeks of water left in reserve," said Damiano Di Simine, an expert with environmental group Legambiente.
From Barron's ● Jun. 27, 2026
Di Dio went missing in June 1995 when she was 37.
From BBC ● Jun. 16, 2026
"The mouse models gave us a biological 'Rosetta Stone,'" said Dr. Adriana Di Martino at the Child Mind Institute.
From Science Daily ● Jun. 3, 2026
“He’s done magic for heads of state,” in addition to Muhammad Ali and Princess Di.
From "A Deadly Wandering: A Mystery, a Landmark Investigation, and the Astonishing Science of Attention in the Digital Age" by Matt Richtel
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DI Collins appealed for anyone with information to contact the police.
From BBC ● Jun. 19, 2026
“We think the DI progress in particular could see consensus expectations for full year margins increase towards the upper half of the guided range, driving a positive reaction to the shares today,” Citi analysts wrote.
From The Wall Street Journal ● Feb. 12, 2026
JD Wyatt gives Poly 47-37 lead after three quarters of DI semifinal at Granada Hills.
From Los Angeles Times ● Feb. 27, 2025
It still needs to be ratified by the DI Board next week, but that is expected.
From Seattle Times ● Apr. 17, 2024
With regard to their names, all four of them come from the same Aryan root DI, meaning “bright,” which occurs in the names of the corresponding Greek deities, Zeus and his old female consort Dione.
From The Golden Bough by Frazer, James George, Sir
"This relationship aligns with natural shifts in the color of ambient illumination, detectable during twilight by mammals with di- and tri-chromatic visual systems."
From Salon ● Nov. 8, 2023
What about lecithin and mono-, di-, and triglycerides?
From "The Omnivore's Dilemma" by Michael Pollan
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In the midafternoon, when the sun is high overhead—the earth’s equator close to the ball of burning fire, just like the di- agram in Understanding Our Universe—we turn onto the dirt road to Yana Urku.
From "The Queen of Water" by Laura Resau
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NOTE.—The forms di- and dif- are euphonic forms of dis-; dif- is used before a root beginning with a vowel.
From New Word-Analysis by William Swinton
Nitro-benzene, di-nitrobenzene, and mono-, di-, and tri-nitro-naphthalenes behave similarly.
From Nitro-Explosives: A Practical Treatise by Sanford, P. Gerald (Percy Gerald)
Thomy ten. di. feod. in Bliston dict. feod.
From The Survey of Cornwall And an epistle concerning the excellencies of the English tongue by Carew, Richard
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.