di
preposition
from; of: used in Italian personal names, originally to indicate place of origin.
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di
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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 American
[dee]
/ di /
Or
Di
preposition
di
2
American
[dee]
/ di /
noun
Music.
Di
3
American
[dahy]
/ daɪ /
noun
Di
4
American
Symbol, Chemistry.
DI
5
American
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Department of the Interior.
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drill instructor.
di-
6
American
di-
7
American
di-
8
American
di.
9
American
Or
dia
abbreviation
di-
1
British
combining form
Di
2
British
symbol
di-
3
British
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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DI
4
British
abbreviation
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Defence Intelligence
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Detective Inspector
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Donor Insemination
di–
Scientific
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:
Additional support for science analysis from the Istituto Nazionale di Astrofisica in Italy; and the Centre National d'Études Spatiales in France is gratefully acknowledged.
From Science Daily ● Aug. 2, 2026
Intesa Sanpaolo launched a $35 billion takeover offer for Banca Monte dei Paschi di Siena, which is also considering a rival proposal to combine with Banco BPM.
From The Wall Street Journal ● Jul. 23, 2026
In Rome, a perennially popular destination for tourists from the UK and around the globe, everyone we spoke to in the Piazza di Spagna had an EES story.
From BBC ● Jul. 19, 2026
Estimated by art historians to have been begun sometime after 1317, the frescoes are considered to be one of Giotto di Bondone's masterpieces.
From Barron's ● Jun. 12, 2026
Suddenly where Nico di Angelo had been standing was a potted plant about five feet tall, with drooping green leaves, tufts of silk, and half a dozen ripe yellow ears of corn.
From "The House of Hades" by Rick Riordan
Last year, she modelled for Di Petsa at London Fashion Week, closing their show in a white lace two-piece, flanked by an angel.
From BBC ● Aug. 12, 2026
“They are two faces of the same coin,” said Francesca Di Giuseppe, fire forecast coordinator at the European Center for Medium-Range Weather Forecasts.
From The Wall Street Journal ● Jul. 29, 2026
Others came up with captions including "Don't Look Up," a reference to the 2021 film starring Leonardo Di Caprio parodying societal apathy to the climate crisis.
From Barron's ● Jul. 29, 2026
He will be replaced by former BMW Italy head Massimiliano Di Silvestre in July.
From BBC ● Jun. 25, 2026
The costume had been for Di Shturem: The Yiddish Tempest, when Molly had played the villain, the vengeful sheyd, Chenya, her frankly inspired take on Shakespeare’s Caliban.
From "Night Owls" by A.R. Vishny
When DI Glyn Walsh returns unexpectedly early from bereavement leave, he and DS Sion Dearden work together to solve the perplexing murder of an esteemed university professor.
From BBC ● Apr. 3, 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
College sports, especially at the DI level, are highly publicized events.
From Salon ● Apr. 22, 2024
This extra width is called the lap, OC being the outside lap and DI the inside or exhaust lap.
From Steam Engines Machinery's Reference Series, Number 70 by Anonymous
"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
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
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
What about lecithin and mono-, di-, and triglycerides?
From "The Omnivore's Dilemma" by Michael Pollan
Thus variously di-, dif-, dis-, des-, de-, and even s-, as in spend.
From Chambers's Twentieth Century Dictionary (part 4 of 4: S-Z and supplements) by Various
Thomy ten. di. feod. in Bliston dict. feod.
From The Survey of Cornwall And an epistle concerning the excellencies of the English tongue by Richard Carew
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.
