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  • i
    i
    the imaginary number .
  • I
    I
    noun
    the ninth letter of the English alphabet, a vowel.
  • i-
    i-
    variant of y-.
  • i.
    i.
    abbreviation
    imperator.
  • -i-
    -i-
    the typical ending of the first element of compounds of Latin words, as -o- is of Greek words, but often used in English with a first element of any origin, if the second element is of Latin origin.
  • I.
    I.
    abbreviation
    Independent.
  • -i
    -i
    suffix
    of or relating to a region or people, esp of the Middle East
Synonyms

i

1 American  
Mathematics.
  1. Also called imaginary unit.  the imaginary number .

  2. a unit vector on the x -axis of a coordinate system.


I 2 American  
[ahy] / aɪ /
Or i

noun

I's, plural Is, plural i's, plural is plural
  1. the ninth letter of the English alphabet, a vowel.

  2. any spoken sound represented by the letter I or i, as in big, nice, or ski.

  3. something having the shape of an I.

  4. a written or printed representation of the letter I or i.

  5. a device, as a printer's type, for reproducing the letter I or i.


I 3 American  
[ahy] / aɪ /

pronoun

we, plural nominative me, objective us, objective my, possessive mine, possessive our, possessive ours possessive
  1. the nominative singular pronoun, used in referring to oneself, the person speaking, writing, or otherwise communicating.


noun

I's plural
  1. (used to denote the narrator of a literary work written in the first person singular.)

  2. Metaphysics. the ego.

I 4 American  

abbreviation

  1. interstate (used with a number to designate an interstate highway).

    I-95.


I 5 American  
Symbol.
  1. the ninth in order or in a series.

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

  3. Chemistry. iodine.

  4. Biochemistry. isoleucine.

  5. Electricity. current.

  6. Logic. particular affirmative.

  7. (italics) isotopic spin.


i- 6 American  
  1. variant of y-.


i. 7 American  

abbreviation

  1. imperator.

  2. incisor.

  3. interest.

  4. intransitive.

  5. island.

  6. isle; isles.


-i- 8 American  
  1. the typical ending of the first element of compounds of Latin words, as -o- is of Greek words, but often used in English with a first element of any origin, if the second element is of Latin origin.

    cuneiform; Frenchify.


I. 9 American  

abbreviation

  1. Independent.

  2. Island; Islands.

  3. Isle; Isles.


-i 1 British  

suffix

  1. of or relating to a region or people, esp of the Middle East

    Iraqi

    Bangladeshi

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

I 2 British  
/ aɪ /

pronoun

  1. (subjective) refers to the speaker or writer

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

-i- 3 British  
  1. used between elements in a compound word Compare -o-

    cuneiform

    coniferous

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

I 4 British  

symbol

  1. chem iodine

  2. physics current

  3. physics isospin

  4. logic a particular affirmative categorial statement, such as some men are married, often symbolized as SiP Compare A E O 1

  5. one See Roman numerals

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

abbreviation

  1. Italy (international car registration)

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
i 5 British  
/ aɪ /

noun

  1. the ninth letter and third vowel of the modern English alphabet

  2. any of several speech sounds represented by this letter, in English as in bite or hit

    1. something shaped like an I

    2. ( in combination )

      an I-beam

  3. to pay meticulous attention to detail

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

I. 6 British  

abbreviation

  1. International

  2. Island or Isle

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

i 7 British  

symbol

  1. Also called: j.  the imaginary number √–1

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

i Scientific  
/ ī /
  1. The number whose square is equal to −1. Numbers expressed in terms of i are called imaginary or complex numbers.


i Idioms  

Grammar

See me.

Other Word Forms

Noun Inflected Forms

Etymology

Origin of I

First recorded before 900; Middle English ik, ich, i, Old English ic, ih; cognate with Gothic ik, German ich, Old Norse ek, Latin ego, Greek egṓ, Old Church Slavonic azŭ, Lithuanian aš, Sanskrit ahám

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 UK's chief medical officer has released new guidance for people on weight loss injections that say people taking the jabs should start strength training, the i Paper reports.

From BBC Jul. 10, 2026

For the fiscal year that began in March, Seven & i now expects revenue to be flat at Y10.43 trillion and net profit to decline 5.0% to Y278.00 billion.

From The Wall Street Journal Jul. 9, 2026

YouTube surpassed Netflix in average daily viewing time in 2025, according to research firm Digital i cited in TechCrunch.

From Barron's Jul. 7, 2026

The i Paper headlines on Burnham's pledge for "growth, housing and No 10 North".

From BBC Jun. 30, 2026

Olly: i know Madeline: Thanks for saving my life.

From "Everything, Everything" by Nicola Yoon

This poignant exhibition at the University of Cambridge spotlights work made during or after violent conflict, ranging from World War I ‘trench art’ to artifacts from the current war in Ukraine.

From The Wall Street Journal Jul. 15, 2026

“My Grandmother made me the person I am,” Dean said, introducing the song.

From Los Angeles Times Jul. 15, 2026

Mark Joseph Stern: There has been a lot of misunderstanding about exactly what the liberal justices did in B.P.J., and I want to clear that up.

From Slate Jul. 15, 2026

"It was a total long shot, but, like a UFO believer, I held on to the possibility of making contact," he said.

From BBC Jul. 15, 2026

“I won’t tell,” I promise, hoping Father will smile at me.

From "Will’s Race for Home" by Jewell Parker Rhodes

Yet that doesn't make its turnaround solely the work of one heavily stubbled mastermind, who saved a company through his singular vision, taste and liberal use of the i- prefix.

From The Guardian Jan. 25, 2011

But it wasn't until Cipla came out with the i- pill in 2007, marketing it to modern young women through television and magazine advertising, that women took to it.

From Time May 26, 2010

I answered, in my-382--vol i- judgement the Italian dress; which answer I found pleased her well, for she delighted to show her golden coloured hair, wearing a caul and bonnet as they do in Italy.

From Memoirs of the Court of Queen Elizabeth by Aikin, Lucy

Another time she visited the dissolved priory of St. Mary Spittle in Bishopsgate-street, which was noted for its pulpit-cross,-268--vol i- where, on set days, the lord-mayor and aldermen attended to hear sermons.

From Memoirs of the Court of Queen Elizabeth by Aikin, Lucy

The old ‘Minor Declensions’ had begun to pass over into the vocalic, especially into the i- and a-, declensions in the oldest OHG.

From A Middle High German Primer Third Edition by Wright, Joseph

And a lot of people, not just the Gilbreths, were very worried that the “best women” i. e. highly educated women were not reproducing.

From Scientific American Sep. 21, 2023

Properties i. and ii. say that line integrals are linear, which is true of single-variable integrals as well.

From Textbooks Mar. 30, 2016

Combining the results from parts i. and ii., draw a rough sketch of f .

From Textbooks Mar. 30, 2016

Within minutes, I got my answer: “@sethporges yes. my girlfriend cathy and i. and i used to do puppet shows.”

From Forbes Jun. 26, 2012

Lewin's Birds of New Holland, fasc. i. pl.

From Zoological Illustrations, Volume I or Original Figures and Descriptions of New, Rare, or Interesting Animals by Swainson, William

It may be a connecting sound, like the -i- in nacht-i-gale.

From A Handbook of the English Language by Latham, R. G. (Robert Gordon)

The concord of the 4th prefix, Mi-, is gi-, -i-, -ji-, and sometimes -mi-.

From Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" by Various

The violin in Baerwald’s hands was the one his German-Jewish grandfather played as a Japanese prisoner of war in the Bandō camp at Tokushima during World War I. “It’s a very serviceable violin,” Baerwald notes.

From Los Angeles Times Jun. 8, 2026

Born in Oregon to Taiwanese immigrants, Wang is herself a beneficiary of the doctrine she defended during the historic oral argument—as am I. Following the argument, interest in her background exploded.

From Slate May 26, 2026

Morris’s mother and father, respectively, were an accomplished organist and a mechanic who had been gassed in World War I. Like Waugh, Morris boarded as a teenager at Lancing College in West Sussex, England.

From The Wall Street Journal Apr. 23, 2026

In a recent study, Purusharth I. Rajyaguru and colleagues used Saccharomyces cerevisiae, a type of yeast commonly used in research, to explore how life might respond to Mars-like stress.

From Science Daily Apr. 12, 2026

“We work with Zegota. She and I. We have for some time now.”

From "Not Nothing" by Gayle Forman

Then, when you get to the step where you’re actually running the check-backup command, add -i ~/Downloads/pegasus.stix2 into the option section.

From The Verge Jul. 21, 2021

Singular masculine words end in -us, plurals end in -i.

From The Guardian Jun. 11, 2010

Thus final -o bespeaks a noun; -a, an adjective; -e, an adverb; -i, an infinitive, etc.

From International Language Past, Present and Future: With Specimens of Esperanto and Grammar by Clark, Walter John

Nouns ending in -a, -e, -i, -y, -o, -l, -n, -t, -ar, -ur, -ŭs are Neuter.

From New Latin Grammar by Bennett, Charles E. (Charles Edwin)

Oncus -i: a welt: applied to welt-like ridges on caterpillars.

From Explanation of Terms Used in Entomology by Smith, John. B.

The company taking the top spot on Gauntlet I’s leaderboard External link was Skycutter, a British startup that partnered with Ukrainian drone company SkyFall.

From Barron's Apr. 28, 2026

They include everything from sketches of Apple logos to the bench and desk of the Apple I’s presentation at the Homebrew Computer Club a half-century ago.

From The Wall Street Journal Apr. 3, 2026

Child I's mother suggested senior managers should face sanctions if they ignore whistleblowers' concerns.

From BBC Sep. 19, 2024

Queen Elizabeth I’s elaborate mask-like daily makeup ritual not only hid her smallpox scars but was also meant to project a preternatural agelessness.

From Los Angeles Times Mar. 24, 2024

Tug said, “If I’s planned it jus’ right, the Tennessee toothpick’ll hit Tug right in that fat butt of hisn!”

From "The Journey of Little Charlie" by Christopher Paul Curtis

Is her mother’s company really doing this to test out proprietary technology while ostensibly doing a good deed for a grieving parent?

From The Wall Street Journal Jul. 15, 2026

Is it possible, many have wondered, to foresee when and where a bluff might collapse — and perhaps even turn these predictions into early warning alerts?

From Los Angeles Times Jul. 14, 2026

Is the latest ICE shooting becoming an issue there?

From Slate Jul. 14, 2026

Is this probability too high or too low?

From MarketWatch Jul. 13, 2026

“That’s him asking you to skip swim practice this week. Is that one heavy?”

From "Red Flags and Butterflies" by Sheryl Azzam

“No matter what the federal government was doing, they knew that if they weren’t dotting their i’s and crossing their t’s, they were going to get called to account,” Hilton said.

From Salon Jul. 15, 2026

"I had really dotted all the i's and crossed all the t's of the experiment," he said.

From Science Daily May 18, 2026

I care that you dot your i’s, you cross your t’s, that if you say you’re going to do something, you do it.

From The Wall Street Journal Mar. 12, 2026

The i's Anna Bonet added Intermezzo is "mature and profound and feels like a culmination of everything she has done before".

From BBC Sep. 23, 2024

At Swarthmore, Libbi got all A’s and B’s and started to spell her name with two i’s.

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

The anecdotes bolster the theory that the U.S. economy is becoming more “K-shaped,” with wealthy Americans thriving as stock prices jump while middle- and low-income Americans struggle, as their wages aren’t keeping up with inflation.

From MarketWatch Jul. 15, 2026

“War Craft” is an uneasy and vivid blend of daydream and nightmarish reality.

From The Wall Street Journal Jul. 15, 2026

The Fed’s beige book is a collection of anecdotes from the central bank’s contacts across the country and is designed to give officials a sense of conditions on the ground before they meet.

From MarketWatch Jul. 15, 2026

This wartime amulet is apotropaic art, attempting to deflect the gamble with death.

From The Wall Street Journal Jul. 15, 2026

Her goal is to escape the attention of authorities and wait for her health to improve.

From "At Last She Stood" by Erin Entrada Kelly

Whenever we watch a silent film, it is helpful to remember that we are encountering an extraordinary survivor, for the vast majority of them are lost forever.

From The Wall Street Journal Jul. 15, 2026

There are steps we could take to make the court seem more like the public body it’s supposed to be.

From Slate Jul. 15, 2026

"Five years ago we asked for a fire plan for Glenmore because we knew something like this would happen. Nothing has happened."

From BBC Jul. 15, 2026

"If we do not see signs of disinflation soon, I am prepared to act," Federal Reserve governor Lisa Cook told an event in Washington.

From Barron's Jul. 15, 2026

On either side of the fire, we cocoon beneath our blankets.

From "Will’s Race for Home" by Jewell Parker Rhodes

The chasteness of Nolan’s version bugs me as it’s insulting he doesn’t trust audiences to grapple with this hero’s moral complexity — and I’m gut-sick that he’s probably right.

From Los Angeles Times Jul. 15, 2026

"Is he apologising because he can't get his facts right or is he apologising for the hurt he's caused me?" he said.

From BBC Jul. 15, 2026

“This recipe gives me the ability to deploy capital to these companies when they trade below intrinsic value,” along with confidence to invest more during periods of industry drawdowns, he said.

From MarketWatch Jul. 15, 2026

“They brought me so much joy,” Nguyen said.

From The Wall Street Journal Jul. 15, 2026

A husband and wife, sitting on a wagon perch, smile at me.

From "Will’s Race for Home" by Jewell Parker Rhodes

“Many of us thought we’d now arrived at the era of making cars with robots, not human hands.”

From The Wall Street Journal Jul. 15, 2026

Her inevitable set closer “Man I Need” is the caliber of a track that will outlive her and all of us, a song that will always belong to the lovers yet to come.

From Los Angeles Times Jul. 15, 2026

We asked you to get in touch via BBC Your Voice to tell us who you thought should be included in a Scottish Hall of Fame and were overwhelmed by your responses.

From BBC Jul. 15, 2026

“For us, that means treating every stock as an ownership stake in the business,” he said.

From MarketWatch Jul. 15, 2026

“Yeah, my dad took us to see one of his plays when it came to Houston.”

From "Split the Sky" by Marie Arnold

Its advanced chromatographic separation process is designed to recover critical minerals from several streams: mixed rare-earth carbonate, recycled magnets, mine tailings, industrial residues, zinc byproducts, electronic scrap and other secondary materials.

From The Wall Street Journal Jul. 14, 2026

Mining giant De Beers is suspending production at South Africa's biggest diamond mine for two years, as changing consumer habits continue to shrink profits.

From BBC Jul. 14, 2026

Knowing as a father that could have been me, could have been friends of mine, I felt very connected to those people.

From Los Angeles Times Jul. 14, 2026

De Beers announced Monday it will pause production at South Africa's largest diamond mine for two years to reduce costs while trading conditions remained tough.

From Barron's Jul. 13, 2026

On the floor of the locker the only mess is mine: a broken bootlace, a hatpin, and a scrap of paper with handwritten text, which I bend to pick up.

From "The Brightwood Code" by Monica Hesse

Detained since late January 2025, he described his time already spent behind bars as “extraordinarily difficult” and said, “I did not betray my country.”

From The Wall Street Journal Jul. 15, 2026

“By the time she was my age she had four kids, one was my mum, and now I get to do this.”

From Los Angeles Times Jul. 15, 2026

"To have all these actors in my debut feature was out of this world."

From BBC Jul. 15, 2026

"I woke up this morning and I didn't have to carry my ID anymore," Maria Jesus Walda, a 34-year-old civil engineer, told AFP as she headed into Gibraltar.

From Barron's Jul. 15, 2026

My neck and back are knotted, tense, my palms wet.

From "Will’s Race for Home" by Jewell Parker Rhodes

The determination to do the right thing is a mark of statesmanship as well as virtue, but not necessarily a formula for success in our political state of nature.

From The Wall Street Journal Jul. 15, 2026

"After my mum passed away, I found myself returning frequently to west Wales, where our family is from," he told BBC Wales.

From BBC Jul. 15, 2026

"I am fully committed to reaching our inflation target, and this commitment is unwavering," she added.

From Barron's Jul. 15, 2026

He said Conagra had what was “probably our strongest innovation pipeline” in place to engage consumers.

From MarketWatch Jul. 15, 2026

Outside the window, our next-door neighbors—an elderly couple, Mr. and Mrs. Brown—paint over the red graffiti spray-painted on their porch.

From "Split the Sky" by Marie Arnold

Ideally, I need to get to $250,000 to buy a modest apartment so my kid can have a place that is ours and has no debt associated with it.

From MarketWatch Jul. 14, 2026

Last week, at an event in Washington, House Speaker Mike Johnson reminded the audience of one of John Quincy Adams’ favorite lines: “Duty is ours; results are God’s.”

From Salon Jul. 10, 2026

The Washington monument is both architecture and sculpture, a powerful symbol with layered meanings for different generations from Washington’s time to ours.

From The Wall Street Journal Jul. 3, 2026

One commenter on the post said: "I'm so happy and deeply touched that France, a country far wealthier and more developed than ours, still places such importance on our country."

From Barron's Jul. 2, 2026

Dad handed off the rifle to Mr. Jimmy Leadill, a near neighbor of ours.

From "The Teacher’s Funeral" by Richard Peck

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