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• 'd
  'd

  contraction of had:
• D
  D

  noun

  the 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'

  preposition

  de (used in French names as an elided form ofde ).
• d-
  d-

  dextrorotatory; dextro- (distinguished from l-).
• d.
  d.

  abbreviation

  (in prescriptions) give.
• D.
  D.

  abbreviation

  day.
• d
  d

  symbol

  physics density or relative density

'd

¹ American  

1. contraction of had:

   I was glad they'd gone.

2. contraction of did:

   Where'd they go?

3. contraction of should or would:

   He'd like to go. I'd like to remind you of your promise.

4. contraction of -ed:

   She OK'd the plan.

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D ² American  

[dee] / di /

Or d

noun

• D's,
  plural
• Ds,
  plural
• d's,
  plural
• ds
  plural

1. the fourth letter of the English alphabet, a consonant.

2. any spoken sound represented by the letter D or d, as in dog, ladder, ladle, or pulled.

3. something having the shape of a D .

4. a written or printed representation of the letter D or d.

5. a device, as a printer's type, for reproducing the letter D or d.

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D ³ American  

abbreviation

1. Electricity. debye; debyes.

2. deep.

3. depth.

4. Optics. diopter.

5. divorced.

6. Dutch.

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D ⁴ American  

Symbol.

1. the fourth in order or in a series.

2. (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.

3. (sometimes lowercase) a classification, rating, or the like, indicating poor quality.

4. Music.

   1. the second tone in the scale of C major, or the fourth tone in the relative minor scale, A minor.

   2. a string, key, or pipe tuned to this tone.

   3. a written or printed note representing this tone.

   4. (in the fixed system of solmization) the second tone of the scale of C major, called re.

   5. the tonality having D as the tonic note.

5. (sometimes lowercase) the Roman numeral for 500.

6. Chemistry. deuterium. Also 2H

7. Electricity.

   1. electric displacement.

   2. a battery size for 1.5 volt dry cells: diameter, 1.3 inches (3.3 centimeters); length, 2.4 inches (6 centimeters).

8. Biochemistry. aspartic acid.

9. a symbol for a shoe width size narrower than E and wider than C.

10. a proportional brassiere cup size larger than C.

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D- ⁵ American  

1. Symbol, Biochemistry. (of a molecule) having a configuration resembling the dextrorotatory isomer of glyceraldehyde: always printed as a small capital, roman character.

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d' ⁶ American  

preposition

1. de (used in French names as an elided form ofde ).

   Charles Louis d'Albert.

2. di (used in Italian names as an elided form ofdi ).

   Gabriele d'Annunzio.

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d' ⁷ American  

1. Informal. contraction of do or did before you:

   How d'you like your eggs cooked? D'you go to the movies last night?

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d- ⁸ American  

Symbol, Chemistry, Biochemistry.

1. dextrorotatory; dextro- (distinguished from l-).

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d. ⁹ American  

abbreviation

1. (in prescriptions) give.

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d. ¹⁰ American  

abbreviation

1. British. pence.

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d. ¹¹ American  

abbreviation

1. date.

2. daughter.

3. day.

4. deceased.

5. deep.

6. degree.

7. delete.

8. Physics. density.

9. depth.

10. deputy.

11. dialect.

12. dialectal.

13. diameter.

14. died.

15. dime.

16. dividend.

17. dollar; dollars.

18. dose.

19. drachma.

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D. ¹² American  

abbreviation

1. day.

2. December.

3. Democrat.

4. Democratic.

5. Physics. density.

6. Deus.

7. Deuteronomy.

8. Doctor.

9. dose.

10. Dutch.

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D. ¹ British  

abbreviation

1. politics Democrat(ic)

2. government Department

3. dinar(s)

4. Don (a Spanish title)

5. Duchess

6. Duke

7. (in the US and Canada) Doctor

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D ² British  

symbol

1. music

   1. 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

   2. a key, string, or pipe producing this note

   3. the major or minor key having this note as its tonic

2. chem deuterium

3. maths the first derivative of a function, as in D( x ³ + x ²) = 3 x ² + 2 x

4. physics

   1. dispersion

   2. electric displacement

5. aeronautics drag

6. 1. a semiskilled or unskilled manual worker, or a trainee or apprentice to a skilled worker

   2. ( as modifier ) See also occupation groupings

      D worker

7. 500 See Roman numerals

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abbreviation

1. Germany (international car registration)

2. 1. informal defence

      I'm playing D in the match this afternoon

   2. informal defensive play

'd ³ British  

contraction

1. would or had

   I'd

   you'd

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d ⁴ British  

symbol

1. physics density or relative density

2. 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

3. chess See algebraic notation

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d ⁵ British  

/ diː /

noun

1. the fourth letter and third consonant of the modern English alphabet

2. a speech sound represented by this letter, usually a voiced alveolar stop, as in dagger

3. 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

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D ⁶ British  

abbreviation

1. Deutsch: indicating the serial number in the catalogue (1951) of the musical compositions of Schubert made by Otto Deutsch (1883–1967)

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d. ⁷ British  

abbreviation

1. (in animal pedigrees) dam

2. daughter

3. currency penny or pennies

4. diameter

5. died

6. dinar(s)

7. dollar(s)

8. drachma(s)

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d Scientific  

1. Abbreviation of diameter

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Other Word Forms

Noun Inflected Forms

• D's
  plural
• Ds
  plural
• d's
  plural
• ds
  plural

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Etymology

Origin of d.⁹

From the Latin word dā

Origin of d.¹⁰

From the Latin word denāriī

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Example Sentences

See Examples For:

'd D D- d' d- d. D. d D's Ds d's ds

“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

Suddenly a face is in front of mine and coffee breath goes up my nostrils and a voice says, I have someone I bet you ’d life to meet.

From "Mockingbird" by Kathryn Erskine

“For those of us whose life circumstances have created options A, B, C, D, E, F and G, she might have options A and B,” El-Sayed said of the anecdote, which couldn’t be independently verified.

From The Wall Street Journal ● Oct. 22, 2026

The rail line known as the purple, or the D, was sometimes referred to as the Subway to the Sea.

From Los Angeles Times ● Oct. 21, 2026

In August, I joined Dart's corrections officers as they prepared for an early morning raid on the jail's high security D block.

From BBC ● Oct. 18, 2026

During open-enrollment periods, eligible adults can switch from traditional Medicare to a private Medicare Advantage plan, change from one Medicare Advantage plan to another, and join or change a Medicare Part D prescription-drug plan.

From MarketWatch ● Oct. 9, 2026

The differences between, say, a D sharp and an E flat, when this happens, are very small, but may be large enough to be noticeable.

From "Understanding Basic Music Theory" by Catherine Schmidt-Jones and Russel Jones

In their most recent assessment, for example, transit scored a D- and hazardous waste a D+.

From National Geographic ● Jul. 17, 2023

Louisiana’s drinking water infrastructure limps in with a D-.

From Washington Post ● Jun. 16, 2021

Ms. E.K. announced that she would be holding before-school tutoring sessions, which Sarah, who finished the fall semester with a D-, never would have attended during remote learning.

From New York Times ● May 13, 2021

The American Society of Civil Engineers’ in 2017 gave the U.S. a D+ for infrastructure, including a D+ for the power grid, a D for airports and a D- for transit.

From Washington Times ● Feb. 12, 2020

Yesterday Captain D- gave me a very nice caross of blessbok skins, which he got from some travelling trader. 

From Letters from the Cape by Lady Lucie Duff Gordon

The maître d’ escorted us to a banquette near a window facing northeast.

From The Wall Street Journal ● Sep. 9, 2026

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

He got into it with the maître d’: “You don’t trust that my date is not going to take pictures?”

From Los Angeles Times ● Aug. 11, 2025

Girmay topped his Gent-Wevelgem victory with another history-making stage win at Giro d' Italia, which after the Tour de France is cycling's second biggest Grand Tour race.

From BBC ● Jul. 19, 2024

Looking more like a restaurant maitre d’ than a cowboy, Joel opened the gate between the two paddocks.

From "The Omnivore's Dilemma" by Michael Pollan

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 Joseph Samachson

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

Use your answers to parts a. and d. to determine which of the three options is best.

From Textbooks ● Mar. 30, 2016

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

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

Franklin D. Roosevelt's Democrats gained nine House seats in 1934, while Bill Clinton's party picked up four in 1998 and George W. Bush's Republicans gained eight in 2002.

From Barron's ● Oct. 13, 2026

At its heart is the Audre D. Carlin Reading Room, where visitors can request items from the library and archive, including recordings of every production staged at the Globe since the mid-1990s.

From BBC ● Oct. 11, 2026

For example, Standard Oil founder John D. Rockefeller has long been considered the richest American in history.

From MarketWatch ● Oct. 9, 2026

The contrast between Justices Thomas and Douglas, who was nominated by President Franklin D. Roosevelt and served from 1939 to 1975, is especially stark.

From The Wall Street Journal ● Sep. 29, 2026

“Exploring the possibility of a link between the World Series and voter turnout in presidential elections,” Jay D. said proudly.

From "Liar, Liar" by Gary Paulsen

Gahr, 21-25, 27-25, 25-21, 26-28, 15-13 Maranatha d.

From Los Angeles Times ● Oct. 22, 2026

Newbury Park Adventist, 25-21, 25-22, 5-25, 25-22 Joshua Springs d.

From Los Angeles Times ● Oct. 22, 2026

Le Lycee, 26-24, 25-20, 22-25, 21-25, 15-11 St. Bonaventure d.

From Los Angeles Times ● Oct. 21, 2026

Oak Hills, 25-15, 25-23, 25-19 Vista Murrieta d.

From Los Angeles Times ● Oct. 21, 2026

Well, Ob had seen how at the supper table you d been too scared to death to ask for anything.

From "Missing May" by Cynthia Rylant

Down the street at D’s Thirsty Beaver bar, Danielle Rees is doing a test run on serving breakfast.

From The Wall Street Journal ● Aug. 16, 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

And what makes Mickey D’s breakfast interesting, suggested CNBC’s Carl Quintanilla, is that it could be considered a “proxy for employment. You’re more likely to visit if you have somewhere to go in the morning.”

From Slate ● Aug. 8, 2025

In fact, studies show that 66% of students who earn all A's play organized sports compared to just 24% of students with mostly D's and F's.

From Salon ● Jan. 1, 2025

She was in the fiction section, removing a book from the D's.

From "The View From Saturday" by E.L. Konigsburg

Only eight banks got Bs, while the majority got Cs; 36 got Ds.

From MarketWatch ● Feb. 27, 2026

Law enforcement sources said this could have been a reference to the "three Ds of insurance" - tactics used by companies to reject payment claims by patients.

From BBC ● Feb. 21, 2025

The same four Ds applied: death, divorce, dislocation, and disaster/downsizing.

From Slate ● Aug. 5, 2024

She’s also boasting a B average in the class, compared to the Ds and Fs earned in her first-year math class.

From Los Angeles Times ● Mar. 19, 2024

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

Dinner maitre d’s are gently professional, warm and welcoming.

From Washington Times ● Jul. 17, 2018

Four hours later across the way, uniformed guards and ushers punch time clocks, and beer and food trucks noisily back up to vending stands as maître d’s and waiters tidy up the clubhouse restaurants.

From New York Times ● Aug. 20, 2015

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

Y y Tabanus dicit, ds ds The Breeze or Horse-flie saith.

From The Orbis Pictus by Charles Hoole

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