- a variation of 2H.
-
'd
'dcontraction of had:
-
D
Dnounthe fourth letter of the English alphabet, a consonant.
-
D-
D-(of a molecule) having a configuration resembling the dextrorotatory isomer of glyceraldehyde: always printed as a small capital, roman character.
-
d'
d'prepositionde (used in French names as an elided form ofde ).
-
d-
d-dextrorotatory; dextro- (distinguished from l-).
-
d.
d.abbreviation(in prescriptions) give.
-
D.
D.abbreviationday.
-
d
dsymbolphysics density or relative density
'd
1 American-
contraction of had:
I was glad they'd gone.
-
contraction of did:
Where'd they go?
-
contraction of should or would:
He'd like to go. I'd like to remind you of your promise.
-
contraction of -ed:
She OK'd the plan.
noun
-
D's,
plural
-
Ds,
plural
-
d's,
plural
-
ds
plural
-
the fourth letter of the English alphabet, a consonant.
-
any spoken sound represented by the letter D or d, as in dog, ladder, ladle, or pulled.
-
something having the shape of a D .
-
a written or printed representation of the letter D or d.
-
a device, as a printer's type, for reproducing the letter D or d.
-
the fourth in order or in a series.
-
(sometimes lowercase) (in some grading systems) a grade or mark, as in school or college, indicating the quality of a student's work as poor or barely passing.
-
(sometimes lowercase) a classification, rating, or the like, indicating poor quality.
-
Music.
-
the second tone in the scale of C major, or the fourth tone in the relative minor scale, A minor.
-
a string, key, or pipe tuned to this tone.
-
a written or printed note representing this tone.
-
(in the fixed system of solmization) the second tone of the scale of C major, called re.
-
the tonality having D as the tonic note.
-
-
(sometimes lowercase) the Roman numeral for 500.
-
Chemistry. deuterium. Also 2H
-
Electricity.
-
electric displacement.
-
a battery size for 1.5 volt dry cells: diameter, 1.3 inches (3.3 centimeters); length, 2.4 inches (6 centimeters).
-
-
Biochemistry. aspartic acid.
-
a symbol for a shoe width size narrower than E and wider than C.
-
a proportional brassiere cup size larger than C.
preposition
-
de (used in French names as an elided form ofde ).
Charles Louis d'Albert.
-
di (used in Italian names as an elided form ofdi ).
Gabriele d'Annunzio.
abbreviation
abbreviation
abbreviation
-
date.
-
daughter.
-
day.
-
deceased.
-
deep.
-
degree.
-
delete.
-
Physics. density.
-
depth.
-
deputy.
-
dialect.
-
dialectal.
-
diameter.
-
died.
-
dime.
-
dividend.
-
dollar; dollars.
-
dose.
-
drachma.
abbreviation
-
day.
-
December.
-
Democrat.
-
Democratic.
-
Physics. density.
-
Deus.
-
Deuteronomy.
-
Doctor.
-
dose.
-
Dutch.
abbreviation
-
politics Democrat(ic)
-
government Department
-
dinar(s)
-
Don (a Spanish title)
-
Duchess
-
Duke
-
(in the US and Canada) Doctor
symbol
-
music
-
a note having a frequency of 293.66 hertz ( D above middle C ) or this value multiplied or divided by any power of 2; the second note of the scale of C major
-
a key, string, or pipe producing this note
-
the major or minor key having this note as its tonic
-
-
chem deuterium
-
maths the first derivative of a function, as in D( x ³ + x ²) = 3 x ² + 2 x
-
physics
-
dispersion
-
electric displacement
-
-
aeronautics drag
-
-
a semiskilled or unskilled manual worker, or a trainee or apprentice to a skilled worker
-
( as modifier ) See also occupation groupings
D worker
-
-
500 See Roman numerals
abbreviation
-
Germany (international car registration)
-
-
informal defence
I'm playing D in the match this afternoon
-
informal defensive play
-
contraction
symbol
-
physics density or relative density
-
maths a small increment in a given variable or function: used to indicate a derivative of one variable with respect to another, as in d y /d x
-
chess See algebraic notation
noun
-
the fourth letter and third consonant of the modern English alphabet
-
a speech sound represented by this letter, usually a voiced alveolar stop, as in dagger
-
the semicircle on a billiards table having a radius of 11 1/ 2 inches and its straight edge in the middle of the baulk line
abbreviation
abbreviation
-
(in animal pedigrees) dam
-
daughter
-
currency penny or pennies
-
diameter
-
died
-
dinar(s)
-
dollar(s)
-
drachma(s)
Other Word Forms
Noun Inflected Forms
Etymology
Origin of d.9
From the Latin word dā
Origin of d.10
From the Latin word denāriī
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:
“If they had said, ‘We’re going to do this for another 20 years,’ I ‘d have been on board in a heartbeat.”
From Los Angeles Times ● May 27, 2026
But still, one by one, we ’d all burned out.
From Salon ● May 7, 2024
“The idea is that we ’d have a whole soup-to-nuts operation in the state and incorporate lessons learned from these different projects,” Hurteau says.
From Scientific American ● Aug. 5, 2021
“Why, this diggin’ ’d make it look like thirty cents.
From Slate ● Nov. 25, 2018
“Oh, Lucy, how I wish you’d been spared from seeing ...” I nodded, not wanting to think or talk about what I 'd seen.
From "The Red Umbrella" by Christina Gonzalez
![]()
That’s when insurance carriers offering Part D coverage start announcing their rates for next year, ahead of the open enrollment window to sign up for coverage.
From Los Angeles Times ● Aug. 4, 2026
This could increase Part D premiums substantially for many of the 23 million Americans enrolled in Part D — even doubling the monthly cost for 11 million or more.
From Los Angeles Times ● Aug. 4, 2026
About 25 million people have standalone Medicare Part D plans, while about 31 million had their drug plan bundled inside a Medicare Advantage plan, according to health research and policy group KFF.
From MarketWatch ● Jul. 29, 2026
He said the subsidies weren’t needed, and other policies that help hold down Part D costs also remain in place.
From The Wall Street Journal ● Jul. 28, 2026
Uncle D sat between Cecile and Ma Charles, and Ma Charles and Miss Trotter sat together and allowed no one between them at the table.
From "Gone Crazy in Alabama" by Rita Williams-Garcia
![]()
In their most recent assessment, for example, transit scored a D- and hazardous waste a D+.
From National Geographic ● Jul. 17, 2023
Catherine Porter, based in Paris, spent three days traveling across the D- Day landing sites in northern France to report this story.
From New York Times ● Jun. 6, 2023
CBS Sports graded the trade a D- for the Wizards.
From Washington Times ● Jan. 24, 2023
Louisiana’s drinking water infrastructure limps in with a D-.
From Washington Post ● Jun. 16, 2021
One shall be Duke of D-, though he has not a foot of land in Dorsetshire; and another is Earl of a village, though he scarce knows where it is situated.
From Letters on England by Voltaire
In the A.I. age, Maggie Hennessy asserts, sparring with a grouchy maître d’ over the phone is part of what makes dining out great.
From Slate ● Jul. 24, 2026
The maître d’ was so rude and they called security on us,” says Bernad.
From Los Angeles Times ● Apr. 27, 2026
“They’re like a private maitre d’ now,” said Nicky Haslam, 84, the English interior designer and social fixture.
From Seattle Times ● May 16, 2024
“A lot of times, you won’t even see the dog” until you seat the owners, said Ally Gallegos, a former maître d’ at an upscale neighborhood restaurant in the West Village.
From New York Times ● May 16, 2024
The maitre d’ pulled sacks of potatoes and onions out of the service elevator and climbed in himself.
From "The Ear, the Eye, and the Arm" by Nancy Farmer
![]()
Ke5, Muzychuk can’t hold back both the d- and g-pawns indefinitely and resigned.
From Washington Times ● Dec. 27, 2022
Both the d- and f-block elements react with nonmetals to form binary compounds; heating is often required.
From Textbooks ● Feb. 14, 2019
They're called d- and l-isomers—d for dextro, l for levo; right and left, you see.
From A Feast of Demons by Samachson, Joseph
New Designs University Park, 16-25, 25-22, 25-21, 22-25, 15-13 Jordan d. 25-23, 25-19, 25-10 Westchester d.
From Los Angeles Times ● Oct. 31, 2024
But just as bell hooks, the feminist writer, and k. d. lang, the singer-songwriter, often see their names appear with unwanted capital letters, lowercase compositions are often capitalized on their way to publication.
From New York Times ● Mar. 17, 2017
From part d. we see that receiving $1 million dollars per year indefinitely is worth $20 million dollars in today’s dollars.
From Textbooks ● Mar. 30, 2016
Use your answers to parts a. and d. to determine which of the three options is best.
From Textbooks ● Mar. 30, 2016
Louisa, only dau. of her father, Edward Byam, d. unm. at Kensington, in 1835.
From Antigua and the Antiguans, Volume II (of 2) A full account of the colony and its inhabitants from the time of the Caribs to the present day by Anonymous
During the Great Depression, President Franklin D. Roosevelt proposed social insurance as a new approach to economic security.
From MarketWatch ● Aug. 3, 2026
Wood was born March 4, 1938, in Philadelphia, the son of Margaretta and Richard D. Wood.
From The Wall Street Journal ● Jul. 31, 2026
Sturgis, Rogers and Ames were all in Fields’ Echo Theater Company production of Samuel D. Hunter’s “Clarkston,” a more scrupulously observed relationship drama with its own share of surprising turns.
From Los Angeles Times ● Jul. 21, 2026
I’ve always understood Max Cady to be a poisonous extension of the male ego, dating back to “The Executioners,” John D. MacDonald’s 1957 book that started it all.
From Salon ● Jul. 17, 2026
All I could think of was if we’d netted a spy like this, Franklin D. Roosevelt would have thrown him back.
From "Jacob Have I Loved" by Katherine Paterson
![]()
KKR’s fee-related earnings jumped 37% from a year ago, and the firm raise d more than $34 billion.
From The Wall Street Journal ● Jul. 30, 2026
Beta Pictoris d is the first directly imaged planet discovered primarily through moderate resolution spectroscopy.
From Science Daily ● Jul. 23, 2026
The presence of Beta Pictoris d could also help astronomers understand the unusual appearance of the system's debris disk.
From Science Daily ● Jul. 23, 2026
Newport Harbor, 25-16, 25-17, 25-22 Redondo Union d.
From Los Angeles Times ● May 5, 2026
“In case d’tempis’ reach dis high, lock your arms ovah d rope an’ hang on, Phill-eep.”
From "The Cay" by Theodore Taylor
![]()
What drives customers to storage, Dietz says are the four D’s: downsizing, decluttering, divorce and death.
From The Wall Street Journal ● Apr. 15, 2026
Because inflammation can accelerate telomere damage, vitamin D's anti-inflammatory properties may help explain its apparent protective effects.
From Science Daily ● Oct. 22, 2025
When he first heard Public Enemy in sixth or seventh-grade, Chuck D’s voice sounded invincible, like he could take on the world alone.
From Los Angeles Times ● Sep. 9, 2024
If you're a big Mickey D's fan, then you might be thrilled about this news.
From Salon ● Dec. 4, 2023
With Uncle D’s help, he’d nearly built it from scratch.
From "P.S. Be Eleven" by Rita Williams-Garcia
![]()
Only eight banks got Bs, while the majority got Cs; 36 got Ds.
From MarketWatch ● Feb. 27, 2026
The words are thought to reference the "three Ds of insurance" - tactics used by companies to reject payment claims from customers.
From BBC ● Feb. 6, 2026
The same four Ds applied: death, divorce, dislocation, and disaster/downsizing.
From Slate ● Aug. 5, 2024
Her grades fell to Ds, and she thought, “College just may not be for me.”
From Los Angeles Times ● Oct. 10, 2023
Disappointed with Ds, pleasantly satisfied with Cs, and celebratory about a B, I allowed my standards at school to become pathetic.
From "The Other Wes Moore: One Name, Two Fates" by Wes Moore
![]()
The researchers intend to continue examining Webb's observations to refine their estimates of Beta Pictoris d's temperature, atmospheric composition, and orbit.
From Science Daily ● Jul. 23, 2026
A small illustration of the eponymous rat hangs in the restaurant, signed by director Brad Bird, who spent days sketching the dining room, capturing the lamps, cheese trolley and maitre d's outfit.
From BBC ● Jan. 29, 2024
Chrostowski has changed out of his jogging gear into the maitre d’s dark suit and bow-tie.
From The Guardian ● Nov. 26, 2019
Dinner maitre d’s are gently professional, warm and welcoming.
From Washington Times ● Jul. 17, 2018
Cologne made me think of voice coaches, of maitre d’s, of old men and their unwanted embraces.
From "Middlesex: A Novel" by Jeffrey Eugenides
![]()
The Cyclones closed the third quarter with a pair of 3-pointers, the second by Ryan in the closing secon ds, that put ISU on top 49-47.
From Seattle Times ● Jan. 18, 2023
Senior forward Oscar ds Silva has played well all season and was named the Pac-12 player of the week after averaging 19.8 points and 11 rebounds in three games last week.
From Washington Times ● Jan. 13, 2021
The number of ds that were added to is one less than the number of the term.
From Textbooks ● Sep. 23, 2020
As a result, we would incorrectly conclude that ds = 0.
From Textbooks ● Mar. 30, 2016
Bo, Bristles surrounding the mouth. ds, Dorsal bristles. hCi, Posterior lateral cilia.
From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" by Various
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.