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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  
/ 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 2 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. 3 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- 4 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 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  

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 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:

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

From Barron's Jul. 16, 2026

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

We lerned learned in science class that anceint ancent ancient people used to beleive that was what life was made of. i guess it makes a little sense.

From "Stella by Starlight" by Sharon M. Draper

"I wanted to help, because of what they've given to me over the years."

From BBC Jul. 17, 2026

"What I do is very personal, and it's mine; nobody can be me," she said.

From Barron's Jul. 17, 2026

"Super Rugby Americas is growing every year and I think that's a good pathway for developing professional habits and preparing players," Contepomi said.

From BBC Jul. 17, 2026

"We already had a pretty lean team and very talented engineers, so the approach I took was, let's do more with the people that we have."

From Barron's Jul. 17, 2026

“Each day the wagon will grow lighter,” I promise.

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

This prefix thus appears as en-, i-, il-, im-, in-, ir-, as enemy, ignoble, illegal, immortal, infirm, irregular.

From Chambers's Twentieth Century Dictionary (part 4 of 4: S-Z and supplements) by Various

And that there never came-99--vol i- gold or stone upon her head, till her sister forced her to lay off her former soberness, and bear her company in her glittering gayness.

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

Cranmer-128--vol i- resisted for some time, but was at length won to compliance by the tears and entreaties of Edward.

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

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

For each of the following functions, determine the i. domain and ii. range.

From Textbooks Mar. 30, 2016

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

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

Dei, i. 22-7.82.This had been suggested by St. Augustine.

From History of European Morals From Augustus to Charlemagne (Vol. 2 of 2) by Lecky, William Edward Hartpole

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

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)

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

But for the 11 months we were married, I experienced the glory of being a we instead of an I. Suddenly I was part of a giant club, the Partnered People.

From Los Angeles Times May 22, 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

“Out of a cupboard,” said I. “And I saw pistols in it,—and jam,—and pills. And there was no daylight in the room, but it was all lighted up with candles.”

From "Great Expectations" by Charles Dickens

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

I E -i formed abstracts and nouns of agency; I E ar go; Min ari, way, track, trail.

From The Dakotan Languages, and Their Relations to Other Languages by Williamson, A. W. (Andrew Woods)

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)

Pg 62 Sometimes it is not. toumba, to fall. toumbarèu, -ello, likely to fall. canta, to sing. cantarèu, -ello, songful. crese, to believe. creserèu, -ello, inclined to belief. -i.

From Frédéric Mistral Poet and Leader in Provence by Downer, Charles Alfred

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

Another important part of Victor I's legacy was to introduce Latin as the common language of the Catholic Church.

From BBC Apr. 28, 2025

“I don’t carry beef with people. And I’m not going to get into the history of Doc and I’s relationship right now. And I probably won’t ever. He’s fine in my book.”

From Los Angeles Times Oct. 10, 2024

She laughed and said, “That’s good. I’s kind of surprised your folks let you go to that meeting in the first place.”

From "Elijah of Buxton" by Christopher Paul Curtis

Is it possible we will see more support for vocational training?

From BBC Jul. 17, 2026

She has now written her autobiography, entitled "Is That You, Petula?"

From Barron's Jul. 17, 2026

Kalshi also opened markets on “Dancing With the Stars,” “Love Is Blind” and “The Traitors.”

From Los Angeles Times Jul. 15, 2026

Appeared in the July 14, 2026, print edition as 'The Future Is Gridlocked'.

From The Wall Street Journal Jul. 13, 2026

“I still feel terrible about coaxing your ba to go to your premiere when I knew he’d hate it. I heard him yelling at you the next day. Is that why you’re moving out?”

From "The Red Car to Hollywood" by Jennie Liu

"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

And I don’t tend to favor biographies, because there generally are some tedious sections in the middle as the writer dots the i’s and crosses the t’s of the subject’s life.

From The Wall Street Journal Apr. 17, 2026

“I know sometimes people feel like, why hasn’t there been more information? But again, just trying to make sure we have i’s dotted and t’s crossed.”

From Los Angeles Times Feb. 26, 2025

"Your proposal does not adequately acknowledge the multiple and significant challenges such a transaction would face from US competition law enforcement agencies," Seven & i's letter added.

From BBC Sep. 5, 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

It is expected that his club, Lille, will be fending off plenty of offers this summer.

From BBC Jul. 17, 2026

"Amateur rugby here in Argentina is booming," Contepomi told BBC Sport.

From BBC Jul. 17, 2026

"Super Rugby Americas is growing every year and I think that's a good pathway for developing professional habits and preparing players," Contepomi said.

From BBC Jul. 17, 2026

Having received a total of 10 bids from more than five bidders, Pele's shirt from the 1958 final is his most valuable item of memorabilia ever sold at auction.

From BBC Jul. 16, 2026

Everything in it is an expression of the many facets of herself, including the sides of her that most people don’t see.

From "At Last She Stood" by Erin Entrada Kelly

He said: "The other guests heard about my situation and made me feel welcome and we formed friendships. I feel wanted - it's given me meaning in life."

From BBC Jul. 17, 2026

"We already had a pretty lean team and very talented engineers, so the approach I took was, let's do more with the people that we have."

From Barron's Jul. 17, 2026

“While we continue to expect modest USD appreciation by year-end, near-term upside is likely to remain capped without a fresh catalyst,” the strategists add.

From The Wall Street Journal Jul. 17, 2026

Another mother, who we are calling Sarah to protect her identity, said she felt "so angry" at the discovery because Campbell had had unsupervised contact with her children.

From BBC Jul. 17, 2026

With the crop in, we work building a cabin.

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

In a reverse from the 1990s, "no-one here has to leave to get on in life", Burnham told me.

From BBC Jul. 17, 2026

"No one can give me back my original appearance, because a lot of fat and skin have been removed," she said.

From Barron's Jul. 17, 2026

“As difficult as it is to leave, it feels like the right time for me to begin a new chapter,” Brown said in a memo to staff.

From The Wall Street Journal Jul. 17, 2026

"I wanted to help, because of what they've given to me over the years."

From BBC Jul. 17, 2026

I feel sorry for Father, Grandpa, and me.

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

"Thomas and the coaches will raise everyone for that and then lead us into qualification for our home Euros in 2028," said Bullingham.

From BBC Jul. 17, 2026

“What stood out to us is there’s a disconnect between expectations and reality,” said Deb Boyden, head of U.S. defined contributions at Schroders.

From MarketWatch Jul. 17, 2026

“Chicago is one of the best markets for us from a loyalty perspective, and it’s growing like crazy,” Pieper said, according to a recording of the meeting.

From The Wall Street Journal Jul. 17, 2026

Our call handlers received a considerable amount of information from members of the public and that assistance has been invaluable in helping us locate Jumaa.

From BBC Jul. 17, 2026

We hear Aunt J’s footsteps as she makes her way to us in the dining room.

From "Split the Sky" by Marie Arnold

"I surely won't make it to retirement in the mine, so I might as well move into a sector with a future," he says.

From Barron's Jul. 17, 2026

"What I do is very personal, and it's mine; nobody can be me," she said.

From Barron's Jul. 17, 2026

Production missed expectations on temporary maintenance at the Los Pelambres mine, although delayed volumes should be recognized in the second half of the year, the analysts say.

From The Wall Street Journal Jul. 15, 2026

At the Venetia mine, De Beers has pledged to use those two years of downtime to make infrastructure more "efficient" with increased "capacity", external, ready to reopen production once market conditions improve.

From BBC Jul. 14, 2026

His eyes land like frost on mine before his lips pull into a smile, thawing them.

From "Red Flags and Butterflies" by Sheryl Azzam

Separately, Former Strictly Come Dancing host Claudia Winkleman explains "Why I'm quitting my new chat show".

From BBC Jul. 17, 2026

"I couldn't open my eyes, my oxygen saturation and blood pressure had dropped," she said, after developing an angioedema -- a swelling in the under-skin tissue -- from the medication she received.

From Barron's Jul. 17, 2026

“Our strategy is working. We are attracting a broad range of luxury customers across product categories, channels and geographies, reinforcing my confidence in the opportunities ahead,” Chief Executive Joshua Schulman said.

From The Wall Street Journal Jul. 17, 2026

"To think that the lives of my daughter, and another five people, are worth less than a year in prison and less than $1,600," Jones told the ABC.

From BBC Jul. 17, 2026

Then she snorts, shoving her nose against my chest.

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

"Thomas and the coaches will raise everyone for that and then lead us into qualification for our home Euros in 2028," said Bullingham.

From BBC Jul. 17, 2026

A US State Department spokesperson said the two countries "continue to identify areas of cooperation that benefit our nations related to trade and some security priorities".

From Barron's Jul. 17, 2026

Lungs, heart, kidneys, liver, brain, testicles, the fluid in our eyes, and ovaries—all have microplastics, says Stapleton.

From The Wall Street Journal Jul. 17, 2026

"Another fantastic opportunity for our men's team to challenge for silverware, with learnings from this tournament and even more support from our brilliant fans to look forward to. Onwards."

From BBC Jul. 17, 2026

I tell her what I saw: A Black boy, about our age, knocking on a white door.

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

Ellis' granddaughter Laura Enston welcomed the news and said: "The shadow of Ruth's execution has fallen across two generations. We have carried shame that was never ours to bear."

From BBC Jul. 8, 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

There’s a rusted-out old backboard a few trailers down from ours that hardly anybody uses.

From "The Million Dollar Shot" by Dan Gutman

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