Jump To:

• j
  j

  a unit vector on the y-axis of a coordinate system.
• J
  J

  noun

  the tenth letter of the English alphabet, a consonant.
• J.
  J.

  abbreviation

  Jack.

j

¹ American  

Symbol.

1. Mathematics. a unit vector on the y-axis of a coordinate system.

2. Engineering. the imaginary number .

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J ² American  

[jey] / dʒeɪ /

Or j

noun

J's, plural Js, plural j's, plural js plural

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

2. any spoken sound represented by the letter J or j, as in just, major, or rajah.

3. something having the shape of a J .

4. a written or printed representation of the letter J or j.

5. a device, as a printer's type, for reproducing the letter J or j.

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J ³ American  

abbreviation

1. Jewish.

2. Physics. joule; joules. Also j

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J ⁴ American  

Symbol.

1. the tenth in order or in a series.

2. (sometimes lowercase) the medieval Roman numeral for 1.

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J. ⁵ American  

abbreviation

1. Cards. Jack.

2. Journal.

3. Judge.

4. Justice.

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J ¹ British  

symbol

1. cards jack

2. joule(s)

3. current density

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abbreviation

1. Japan (international car registration)

j ² British  

symbol

1. maths the unit vector along the y -axis

2. Also called: i.  obsolete the imaginary number √–1

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j ³ British  

/ dʒeɪ /

noun

1. the tenth letter and seventh consonant of the modern English alphabet

2. a speech sound represented by this letter, in English usually a voiced palato-alveolar affricate, as in jam

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J Scientific  

1. Abbreviation of joule

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Other Word Forms

Noun Inflected Forms

• J's
  plural
• Js
  plural
• j's
  plural
• js
  plural

Example Sentences

See Examples For:

j J J. J's Js j's js

The memes typically used goofy broken English to reveal the inner thoughts of Kabosu and other shiba inu "doge" - pronounced like pizza "dough" but with a "j" at the end.

From BBC ● May 24, 2024

With these new values for i, j and k, continue the algorithm at step 2.

From Scientific American ● Oct. 24, 2023

Repeat this algorithm for all one-digit numerical values of i, j and k, and the result will always be either a happy or a sad number.

From Scientific American ● Oct. 24, 2023

Trubisky j oined the Steelers in March 2022 after a stint backing up Josh Allen in Buffalo.

From Washington Times ● May 19, 2023

Ma j or Danby flinched and turned his face away uncomfortably for a second.

From "Catch-22" by Joseph Heller

Dubbed 'King Kazu' in Japan, he is one of the country's most loved sportsmen and was the face of the J League when it launched in 1993.

From BBC ● Jul. 26, 2026

Since then, El Malilla has expanded the scope of reggaeton Mexa following collaborations with Puerto Rican pioneers such as Jowell y Randy and Colombian superstar J Balvin.

From Los Angeles Times ● Jul. 20, 2026

Singer-songwriter Jessie J, who received the outstanding achievement prize, told BBC News that music had helped her through two years of treatment for breast cancer, including a mastectomy.

From BBC ● Jul. 10, 2026

Spain will face the second-place finisher in Group J, which will be determined late Saturday by the match between Algeria and Austria.

From Los Angeles Times ● Jun. 27, 2026

What I think makes Aunt J so beautiful isn’t her shape or her hair; it’s the dimple on her left cheek.

From "Split the Sky" by Marie Arnold

Regret is often an internal signal that a behavior was inconsistent with our goals or values, says J. Kim Penberthy, a professor of psychiatry and neurobehavioral sciences at the University of Virginia.

From MarketWatch ● Jul. 24, 2026

Alan Turing's famous ideas about artificial intelligence may have sent AI research down the wrong path for the past 75 years, according to prominent computer scientist Peter J. Denning.

From Science Daily ● Jul. 14, 2026

Daniel J. Sullivan is a retired school teacher and political novice.

From Los Angeles Times ● Jul. 12, 2026

After an investigation, Daniel J. Sullivan was removed from the Aug. 18 primary ballot.

From Los Angeles Times ● Jul. 12, 2026

We all look at one another, and let’s just say not all of us are excited about that prospect—least of all Aunt J. Grandma immediately says she has a lot to do.

From "Split the Sky" by Marie Arnold

In Group J's other match, second-placed Wales also ran up seven goals as they beat North Macedonia 7-1 with Harry Wilson scoring a hat-trick of set-piece goals.

From Barron's ● Nov. 18, 2025

But the most recognizable example is LL Cool J's "Father."

From Salon ● Dec. 30, 2024

Her interest in hip-hop stretches back at least to her first time hearing LL Cool J’s debut album, “Radio,” in 1985, and its influence was sometimes felt in her work with Sonic Youth.

From Los Angeles Times ● Mar. 25, 2024

"J wasn't event embarrassed," Britney added after her assistant mocked J's greeting.

From BBC ● Oct. 25, 2023

I stare at my J’s as I kick my feet back and forth.

From "The Hate U Give" by Angie Thomas

I’m out there in some Artful Dodger, LRG and Evisus with the Js — hood classics, you feel me?

From New York Times ● Jan. 19, 2022

Jackie was for the three Js — John, Jim and Jesse — while Lee was for Lyn.

From Washington Post ● Jul. 11, 2020

Same solid drives, same high, metronomic dribble, same deadening retinue of mid-range Js.

From The New Yorker ● Oct. 25, 2019

With a single letter distinguishing their first names, they're referred to collectively as "the Js" by cast and crew.

From Los Angeles Times ● Mar. 21, 2018

“We’re teammates, so I tolerate you. That doesn’t mean I like you. Besides, Drew and I’ve been carrying your deadweight for two years. All you do is shoot Js that you can’t make.”

From "Here to Stay" by Sara Farizan

Those throaty "j's" and growled "g's" have long found their truest expression in the music that's synonymous with Spain – flamenco.

From The Guardian ● Jun. 19, 2012

I did manage, however, to find our boat's address and the name of the caretaker, both of which I had on a piece of paper with loose "i's" and "j's" scattered thickly through every word.

From The Chauffeur and the Chaperon by Anderson, Karl

There are twenty-four j's in it, and seventeen g's, so you may imagine that it is difficult.

From Five Mice in a Mouse-trap by the Man in the Moon. by Ledyard, Addie

The national song of the Basques, a matter of some dozen stanzas, written principally in "j's," "rr's," and "tz's," takes its theme, if one may trust the Castilian translation, from this symbolic oak.

From Spanish Highways and Byways by Bates, Katharine Lee

The harbor-master pronounced his r's very much like j's.

From The Fourth Estate, vol.1 by Palacio Vald?s, Armando

I love the html and js side of the web, but when it comes to CSS, I can design as well as John McCain can pick a running-mate.

From Forbes ● Aug. 16, 2012

But the Brody kids are remarkably well-cast too, and I like how the script and Morgan Saylor’s performance left it open to interpretation js how much she really did or didn’t believe Carrie.

From Time ● Dec. 19, 2011

In the middle all js speed: bugles blow there, stallions leap, and the beards of riding Khans shake out like flame along a wind of fruits and blossoms.

From Time Magazine Archive

These were the first steps toward establishing the security which js M.G.'s chief job.

From Time Magazine Archive

A scene in which the young man fancies he js in communication with the shade of Millhouser's mother is as embarrassing as any in recent fiction.

From Time Magazine Archive