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

Choose a value from 0 to 9 for i, j and k.

From Scientific American ● Oct. 24, 2023

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

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

“The Second Sons have no place for mummers,” the bravo j in pink said scornfully.

From "A Dance with Dragons" by George R. R. Martin

Profit from Berkshire’s portfolio of manufacturing, service and retailing businesses—a group that includes industrial metal components, Duracell batteries and Flying J fuel stations—jumped 24% to $4.47 billion.

From The Wall Street Journal ● Aug. 8, 2026

As a result, the passage of Measure G repealed Measure J.

From Los Angeles Times ● Jul. 28, 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

But it has now also surpassed director Christopher Nolan's 2023 film about the American theoretical physicist J Robert Oppenheimer, which previously held the box office record for any film based on a real-life figure.

From BBC ● Jun. 29, 2026

Aunt J is scrolling through her Facebook feed, hyped about the fact that the number of counterprotesters has grown.

From "Split the Sky" by Marie Arnold

Three weeks into this deliberation, I met J. He came out of nowhere, it seemed, except I knew exactly where he came from: the same small-ish town that I did, including the same high school.

From Los Angeles Times ● Aug. 13, 2026

The screening process can also include poring over artists’ social media, according to Julie Coulter, the owner of J. Coulter & Co.

From The Wall Street Journal ● Aug. 6, 2026

Schoenbrun has an obvious familiarity with the horror canon, and I would guess owns a dog-eared copy of “Men, Women, and Chainsaws,” Carol J. Clover’s classic book on the genre.

From The Wall Street Journal ● Aug. 6, 2026

Inside the exhibit hall I ran into actor Sam J. Jones, the former football player who played Flash Gordon back in 1980.

From Salon ● Jul. 31, 2026

When he was well enough to get out of bed, he carried The Illustrated Natural History by J. G. Wood under one arm, and a book about Africa under the other.

From "Death on the River of Doubt" by Samantha Seiple

The number likely refers to Ray J’s heart’s ejection fraction, which measures the volume of blood coming out of the heart’s left ventricle or being drawn into the right ventricle when the heart beats.

From Los Angeles Times ● Jan. 29, 2026

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

Baby J's parents told the public inquiry how they desperately tried to keep their daughter at another hospital after she was transferred there for a brief time.

From BBC ● Sep. 23, 2024

I text her even though she’s just a few yards away in Aunt J’s room.

From "Split the Sky" by Marie Arnold

I think he’s one of the most underrated spiritual voices in the city, and he’s a pastor who wears Js, so that’s just kind of cool in itself to get the word like that.

From Los Angeles Times ● Sep. 26, 2025

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

Guys were raining Js from deep, doing spin moves through the lane and throwing down in traffic.

From "We Were Here" by Matt De La Peña

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

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 Addie Ledyard

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

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

She said that we could find enough to do minding our p's and q's in life, without quarreling over "i's" and "j's"; so the argument ended, and the girls turned their attention to making tea.

From The Chauffeur and the Chaperon by Karl Anderson

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 Katharine Lee Bates

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

He js "much embarrassed," but listens respectfully, then makes a little speech.

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