j
a unit vector on the y-axis of a coordinate system.
j
1 AmericanSymbol.
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Mathematics. a unit vector on the y-axis of a coordinate system.
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Engineering. the imaginary number .
J
2
American
[jay]
/ dʒeɪ /
Or
j
noun
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J's,
plural
-
Js,
plural
-
j's,
plural
-
js
plural
-
the tenth letter of the English alphabet, a consonant.
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any spoken sound represented by the letter J or j, as in just, major, or rajah.
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something having the shape of a J .
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a written or printed representation of the letter J or j.
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a device, as a printer's type, for reproducing the letter J or j.
J
4
American
Symbol.
-
the tenth in order or in a series.
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(sometimes lowercase) the medieval Roman numeral for 1.
J.
5
American
abbreviation
-
Cards. Jack.
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Journal.
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Judge.
-
Justice.
J
1
British
symbol
-
cards jack
-
joule(s)
-
current density
abbreviation
j
2
British
symbol
-
maths the unit vector along the y -axis
-
Also called: i. obsolete the imaginary number √–1
j
3
British
/ dʒeɪ /
noun
-
the tenth letter and seventh consonant of the modern English alphabet
-
a speech sound represented by this letter, in English usually a voiced palato-alveolar affricate, as in jam
J
Scientific
Other Word Forms
Noun Inflected Forms
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
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
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
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
Mully had the keys for the j three gates, where bars of black iron as thick as a man’s arm closed off the passage.
From "A Dance with Dragons" by George R. R. Martin
Nowhere is the impact more obvious than at the Flying J, just over the border from Louisiana at the crossroads of a U.S. consumer economy that runs on diesel.
From The Wall Street Journal ● Oct. 4, 2026
She also collaborated with Milo J on “Llora Llora” — a folksy lullaby off the Argentine rapper’s masterpiece “La Vida Era Más Corta.”
From Los Angeles Times ● Sep. 29, 2026
Over the years, music and dancing have figured prominently in Gap’s advertising, whether it was models in khaki pants dancing to swing or performances by Madonna, Missy Elliott, LL Cool J and Aerosmith.
From The Wall Street Journal ● Sep. 22, 2026
As a result of the files, the US-Ireland Alliance said the George J Mitchell Scholarship Program would no longer bear his name.
From BBC ● Sep. 21, 2026
The next person to speak is Aunt J, but I can’t repeat most of what she said without getting grounded.
From "Split the Sky" by Marie Arnold
Mathias J. Weber and Russell E. Vanderhoff’s seductively streamlined Health-o-Meter scale gave the illusion that homeowners could be scientists, for the first time monitoring their own weight and growth.
From Los Angeles Times ● Oct. 7, 2026
Some may take issue with likening Oprah Winfrey to J. Robert Oppenheimer, the father of the atomic bomb.
From Salon ● Sep. 27, 2026
The J. Paul Getty Museum claims over 3,200 works simply titled Portrait of a Woman, including variations tagged with young, girl or lady.
From The Wall Street Journal ● Sep. 26, 2026
As Johns Hopkins art historian Stephen J. Campbell recounts in his 2020 book, “Andrea Mantegna: Humanist Aesthetics, Faith, and the Force of Images,” scholars agree to disagree.
From The Wall Street Journal ● Sep. 25, 2026
Boots and waffle stompers tracked mud and icy water into the halls of Irwin J. Sneed Elementary School, where the wearers were met by Mr. Costa holding a large mop.
From "Ralph S. Mouse" by Beverly Cleary
This spring, the two showed their support by covering each other’s song for Triple J’s “Like a Version.”
From Los Angeles Times ● Jun. 4, 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
When everything comes into focus, I realize I’m lying on the small red sofa in the back office of Aunt J’s hair salon.
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
“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
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
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
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 Karl Anderson
The harbor-master pronounced his r's very much like j's.
From The Fourth Estate, vol.1 by Armando Palacio Vald?s
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
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
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
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
