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• r
  r

  the theoretical intrinsic rate of increase of a population, equivalent to the difference between the birth and death rates divided by the number of individuals in the population.
• R
  R

  noun

  the 18th letter of the English alphabet, a consonant.
• r.
  r.

  abbreviation

  rabbi.
• R.
  R.

  abbreviation

  (in prescriptions) take.

r

¹ American  

Ecology.

1. the theoretical intrinsic rate of increase of a population, equivalent to the difference between the birth and death rates divided by the number of individuals in the population.

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r ² American  

abbreviation

• rs
  plural

1. radius.

2. Commerce. registered.

3. Electricity. resistance.

4. Physics. roentgen.

5. royal.

6. ruble.

7. rupee.

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R ³ American  

[ahr] / ɑr /

Or r

noun

• R's,
  plural
• Rs,
  plural
• r's,
  plural
• rs
  plural

1. the 18th letter of the English alphabet, a consonant.

2. any spoken sound represented by the letter R or r, as in ran, carrot, or rhyme.

3. something having the shape of R .

4. a written or printed representation of the letter R or r.

5. a device, as a printer's type, for reproducing the letter R or r.

6. three R's.

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R ⁴ American  

[ahr] / ɑr /

verb

1. Informal. are.

   Oysters R in season.

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R ⁵ American  

abbreviation

1. Trademark. restricted: a rating assigned to a movie by the MPA indicating that children under the age of 17 will not be admitted to a theater showing the film unless accompanied by an adult.

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R ⁶ American  

abbreviation

1. Chemistry. radical.

2. Mathematics. ratio.

3. regular: a man's suit or coat size.

4. Electricity. resistance.

5. Theater. stage right.

6. Physics. roentgen.

7. Chess. rook.

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R ⁷ American  

Symbol.

1. the 18th in order or in a series.

2. (sometimes lowercase) the medieval Roman numeral for 80.

3. Biochemistry. arginine.

4. Physics. universal gas constant.

5. registered trademark: written as superscript ® following a name registered with the U.S. Patent and Trademark Office.

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r. ⁸ American  

abbreviation

• rs
  plural

1. rabbi.

2. railroad.

3. railway.

4. range.

5. rare.

6. Commerce. received.

7. recipe.

8. replacing.

9. residence.

10. right.

11. rises.

12. river.

13. road.

14. rod.

15. royal.

16. rubber.

17. ruble.

18. Baseball. run; runs.

19. rupee.

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R. ⁹ American  

Or R.

abbreviation

1. (in prescriptions) take.

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R. ¹⁰ American  

abbreviation

1. rabbi.

2. Radical.

3. radius.

4. railroad.

5. railway.

6. (in South Africa) rand; rands.

7. Réaumur.

8. rector.

9. redactor.

10. regina.

11. Republican.

12. response.

13. rex.

14. river.

15. road.

16. royal.

17. ruble.

18. rupee.

19. Theater. stage right.

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R. ¹ British  

abbreviation

1. registered (trademark)

2. right

3. river

4. rouble

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R. ² British  

abbreviation

1. rabbi

2. rector

3. Regina

4. Republican

5. response (in Christian liturgy)

6. Rex

7. River

8. Royal

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R ³ British  

symbol

1. chem radical

2. currency

   1. rand

   2. rupee

3. Réaumur temperature (scale)

4. physics electronics resistance

5. roentgen or röntgen

6. chess rook

7. Royal

8. chem gas constant

9. 1. restricted exhibition (used to describe a category of film certified as unsuitable for viewing by anyone under the age of 18)

   2. ( as modifier )

      an R film

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r. ⁴ British  

abbreviation

1. rare

2. recto

3. Also: r.  rod (unit of length)

4. ruled

5. cricket baseball run(s)

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r ⁵ British  

/ ɑː /

noun

1. the 18th letter and 14th consonant of the modern English alphabet

2. a speech sound represented by this letter, in English usually an alveolar semivowel, as in red

3. See three Rs

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r Scientific  

1. Abbreviation of radius

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R Idioms  

1. see three R's.

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Other Word Forms

Noun Inflected Forms

• R's
  plural
• Rs
  plural
• r's
  plural
• rs
  plural

Etymology

Origin of R⁵

An American designation established in 1968

Origin of R.⁹

From the Latin word recipe

Example Sentences

See Examples For:

r R r. R. R's Rs r's rs

In June 2018, Sampath allegedly texted Peng asking, “What r the other opportunities in Lausd. That we can exploit. Any other area.”

From Los Angeles Times ● Mar. 27, 2026

“I need your help and u r powerful strong man.”

From The Wall Street Journal ● Feb. 12, 2026

These risks linger as r ecent resilience in the economy shows signs of fading.

From Barron's ● Oct. 14, 2025

Defense Secretary Lloyd Austin signed the order last week to extend the four ships’ deployment for a second time, rather than bring the carrier, the USS Dwight D. Eisenhowe r, and its three warships home.

From Seattle Times ● May 31, 2024

Y r u being so creepy n txting my frnd?

From "Ask the Passengers" by A.S. King

Test your knowledge of the English language: How many words can you create with the letters P, Y, C, R, O, and T?

From Slate ● Jul. 20, 2026

Some of those projects like the LIV Golf Tour never seemed to add up in the first place, according to Ellen R Wald.

From BBC ● May 25, 2026

R: I never, ever imagined that this could happen.

From Barron's ● May 21, 2026

“It hasn’t mattered if there was an R or a D after their name,” Roxanne said.

From Salon ● Apr. 19, 2026

Next I see the G, R, and A. I say it: “Full...of...grass?”

From "The Truth as Told by Mason Buttle" by Leslie Connor

For Chicago, Sharon chose avery r. young, a Chicago-born Black poet, composer and activist.

From Washington Times ● Apr. 28, 2021

As pitcher plants go, N. r. elongata is especially well suited to the bats.

From Science Magazine ● Jan. 26, 2011

During 7 weeks of daily pitcher patrols, Grafe and his team found bats in more than one-quarter of the 223 N. r. elongata plants they checked.

From Science Magazine ● Jan. 26, 2011

It would thus take 2,000 X rays to deliver a presumably damaging 10 r. to a man's gonads.

From Time Magazine Archive

She erected a big white sign in the front yard on which she had carefully painted, in black letters with gold outlines, r. m. walls art studio.

From "The Glass Castle" by Jeannette Walls

Ryan worked with Evan R. Kulman of Compass on the listing, while Douglas Elliman agents Paul Brennan and Martha Gundersen helped to secure a buyer for the dwelling.

From MarketWatch ● Aug. 4, 2026

Jackson Walker agreed to pay $15 million to settle a civil case over an undisclosed relationship with former bankruptcy judge David R. Jones.

From The Wall Street Journal ● Aug. 3, 2026

While the case was largely managed by assistant U.S. attorney Caelainn Carney, according to court transcripts, Faruqui was aiming his frustration at her bosses, including senior prosecutor Jonathan R. Hornok, and the leadership at DOJ.

From Salon ● Jul. 30, 2026

Prior to Sony’s purchase, the dome had long been owned by the family of William R. Forman, the founder of Pacific Theatres.

From Los Angeles Times ● Jul. 22, 2026

“No, J. R. We didn’t bring any back with us, for reasons I explained.”

From "Do Androids Dream of Electric Sheep?" by Philip K. Dick

Also, a radical idea: “We need to ensure that our students are graduating with the right grade level skills of the 4 R’s: reading, writing, arithmetic, and reasoning.”

From Slate ● Feb. 5, 2024

You’re in such a unique position because vintage dealers are often checking off each box in the three R’s of recycling: reduce, reuse, recycle.

From Los Angeles Times ● Oct. 10, 2023

“We appreciate the seriousness with which the panel of inquiry undertook to investigate irregularities surrounding the Lady R’s presence in South Africa in December 2022,” David S. Feldmann, a spokesperson at the U.S.

From Seattle Times ● Sep. 6, 2023

Their “Threepenny” selections in particular demonstrated how best to balance the piece’s infectious melodies and bitter texts: Gerstein’s playing buoyant and dancing, Gruber’s semi-Sprechstimme snarling, with wickedly rolling R’s on phrases like “Beefsteak Tartar.”

From New York Times ● Jul. 11, 2023

Remarkably, the three R’s of gene physiology are acutely dependent on the molecular structure of DNA—on the Watson-Crick base pairing of the double helix.

From "The Gene" by Siddhartha Mukherjee

To go American, Mielewska said it's all about getting the Rs and the vowels right.

From Barron's ● Mar. 5, 2026

According to the team, the foundation of a circular space economy lies in the 3 Rs: reduce, reuse, and recycle.

From Science Daily ● Dec. 3, 2025

There are plenty of Rs in the mix, and we’re glad to have new allies.

From The Wall Street Journal ● Nov. 25, 2025

My 4-year-old grandson can count the three Rs in strawberry.

From MarketWatch ● Nov. 3, 2025

When Mr. MacMahon said words like terrible he made it sound like they had seven or eight Rs in ’em ’stead of just one.

From "Elijah of Buxton" by Christopher Paul Curtis

New England is ready to absorb Scotland as its seventh state as soon as the Scots agree to stop pronouncing their r’s.

From The Wall Street Journal ● Jun. 29, 2026

Leto’s grumbling Brit-inflected baritone is an unrecognizable concoction of trilled r’s and plummy vowels — and the best performance he’s done in years.

From Los Angeles Times ● Jun. 3, 2026

Ms. Walters, who died Dec. 30 at her home in New York, according to ABC, spent the following decades overcoming her mangled r’s and became one of television’s premier interrogators of the newsworthy.

From Washington Post ● Dec. 30, 2022

Deslorieux has the strongest voice of the main cast, crooning with delicate rolling r’s for her character’s accent.

From New York Times ● Nov. 4, 2021

“No,” Mrs. Johnson said, “Porto Rico. Keep your r’s soft. Try again.”

From "When I Was Puerto Rican" by Esmeralda Santiago

There's a lot of spoken dialogue and I was doing my best to not sound too horribly American - - to soften my rs and elongate my vowels.

From The Guardian ● Oct. 8, 2012

Do you involve the surfe rs and the people in the movie in editing their sections in the movie?

From Time Magazine Archive

Submissions will be reviewed by an esteemed panel of former Showdown winners, photo edito rs and industry leaders, and voted on by ballot to determine the top 5 invited artists.

From Time Magazine Archive

Two years ago Promoter Vandeburg talked Fair managers into selling their Big Show rs a peg on which to hang a national campaign of travel to eleven far-western States instead of merely plugging San Francisco.

From Time Magazine Archive

And I remember something I learned in school, a trabalenguas, tongue twister, with lots of rs: Rápido rápido corren los carros sobre los rieles del ferrocarril.

From "Beast Rider" by Tony Johnston & María Elena Fontanot de Rhoads