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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  

/ 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. ² 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. ³ 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. ⁴ British  

abbreviation

1. registered (trademark)

2. right

3. river

4. rouble

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R ⁵ 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 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

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Etymology

Origin of R⁵

An American designation established in 1968

Origin of R.⁹

From the Latin word recipe

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Example Sentences

See Examples For:

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

Mark Joseph Stern: This idea of republican virtue, lowercase r, civic virtue, the Framers were obsessed with it.

From Slate ● Aug. 17, 2026

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

From The Wall Street Journal ● Feb. 12, 2026

All togethe r, Pfizer and its peers seem to have come out far better than expected from the Trump administration’s pricing and tariff gambits.

From Barron's ● Sep. 30, 2025

“They r a gift I accept more than money or shiny objects.”

From Los Angeles Times ● Jul. 22, 2024

But we gain an r in occurrence, occurred, and occurring. orient.

From "Woe Is I" by Patricia T. O'Conner

R “Ray” Wang, founder and chairman of Constellation Research, said that while some AI developers may not survive, capacity will still be needed.

From The Wall Street Journal ● Nov. 2, 2026

It has done ads for Virgin and Toys R Us.

From Los Angeles Times ● Oct. 17, 2026

She describes the purpose of the visit as an "off-site meetings with Mr K R Murdoch and other senior executives from News Corp and News UK".

From BBC ● Sep. 23, 2026

The Multistrada is typically shopped against the equally intrepid BMW R 1300 GS; and KTM’s 1390 Super Adventure.

From The Wall Street Journal ● Aug. 29, 2026

These were two sides of two different authentic nickels, expertly hollowed out, and—look at this—whoever made it had drilled an almost invisibly tiny hole in the R of the word TRUST.

From "Fallout: Spies, Superbombs, and the Ultimate Cold War Showdown" by Steve Sheinkin

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

From Washington Times ● Apr. 28, 2021

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

Now a professor at the Royal Roads University in Victoria, Canada, he says he, too, happened upon a couple of bats nestled in N. r. elongata pitchers, but he "never put two and two together."

From Science Magazine ● Jan. 26, 2011

Reported by Jay Branegan/Chicago The Post spurns p. r. "wolves" Reporters often rely on publicists to alert them to stories, but customarily dismiss the public relations trade as "flackery."

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

The USS Gerald R. Ford set a post-Vietnam War record when it returned to Naval Station Norfolk in Virginia in May from a 326-day deployment, which also earned the team a rare Presidential Unit Citation.

From Los Angeles Times ● Oct. 8, 2026

The Lincoln is not the only American carrier to face issues during a lengthy time at sea: the USS Gerald R. Ford also suffered various problems during a recent 326-day deployment.

From Barron's ● Oct. 7, 2026

Holding court at the George R. Brown Convention Center in Houston, the brokerage’s executives unveiled a slew of new tools and services.

From The Wall Street Journal ● Sep. 29, 2026

Led by Chelsy R. Eddings and colleagues, including Watanabe, the work appeared online in Neuron on November 24, 2025, and in its February 4, 2026, issue.

From Science Daily ● Sep. 17, 2026

A weird terror struck at J. R. Isidore.

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

Anti-terror prosecutor Jean-François Ricard said that Armand R's mother had raised concerns about his behaviour although there was no evidence at the time to take further measures against him.

From BBC ● Dec. 5, 2023

Once rolling, the two cars are pretty even, but the advantages of the Golf R’s traction-enhancing all-wheel drive and quick-shifting automatic are undeniable.

From Seattle Times ● Nov. 1, 2023

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

That was the way my mind lurched and stumbled, among the sharp R's and T's, sliding over the ovoid vowels as if on pebbles.

From "The Handmaid's Tale" by Margaret Atwood

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

The gravelly voice spoke her name like a native Spanish speaker would, a light roll of the Rs leading into the clipped A. It didn’t matter.

From "Shadowshaper" by Daniel José Older

Around this time, AI tools were still famously bad at answering one math question that wouldn’t appear on any standardized test: How many r’s are in the word strawberry?

From The Wall Street Journal ● Oct. 24, 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

Her accent clipped off the final r's, making the words come out "remembah" and "ovah."

From Salon ● Jun. 19, 2023

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

Donal rolled his r’s as he said it.

From "Moon Over Manifest" by Clare Vanderpool

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

Rolling his rs, the Rev. Peter Marshall, Scottish-born chaplain of the U.S.

From Time Magazine Archive

Then came the Old Bear with the main force, Ser Mallador Locke with the baggage train and packhorses, and finally Ser Ottyn Wythe rs and the rear guard.

From "A Clash of Kings" by George R.R. Martin

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