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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  

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 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  
  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  
/ 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 5 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 6 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 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

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

"Heatwave UK: 50-year record broken again" reports the i Paper, as the Met Office forecasts 37C on Friday.

From BBC Jun. 26, 2026

Serenity: soooo i guess u haven’t brought it up with your parents? still sneaking around? and he is good, we’re going camping later this week.

From "I Can Make This Promise" by Christine Day

“I said, ‘Well, if this is so cool to win a title, then I want to win more titles,” he said.

From Los Angeles Times Jul. 18, 2026

"I've done it most days since I was seven years old and it still hasn't stopped," he said.

From BBC Jul. 18, 2026

In his first reaction to the protests, Fedorov wrote on Telegram: "I thank you for the hope."

From Barron's Jul. 18, 2026

Also see: Is it better to spend my savings now so I can delay taking Social Security?

From MarketWatch Jul. 18, 2026

“Pa likes to remember me brave. But I was scared.”

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

Intelligence however had no-175--vol i- sooner reached the court of the reception afforded to the princess at Ricot, than directions arrived for her immediate removal to Woodstock.

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

I think ye guess whom they named; if ye do not, I-290--vol i- will upon my next letters write further.

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

The gentlemen pleaded,-141--vol i- on the other side, the urgency of their commission, and said that they had brought the queen's litter for her conveyance.

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

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

Common law protected until and statute law after publication, i. e. when the public in general is first permitted to view the work.

From Copyright: Its History and Its Law by Bowker, Richard Rogers

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

I’ve been a huge Robyn fan for most of my life — she’s kind of a north star for my sisters and I. It’s no secret that we love sad dance songs.

From Los Angeles Times Jun. 18, 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

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

Yes, Jonny didn't play up to scratch but neither did I. I was trying too hard because I wanted to win.

From BBC Mar. 26, 2026

“He had some things to apologize for...so did I. We have a wall between us that’s built over time—from before I was your age.”

From "Caterpillar Summer" by Gillian McDunn

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

The suffix -i, added to a noun stem, forms generally a neuter verb.

From The Mafulu Mountain People of British New Guinea by Williamson, Robert Wood

The suffix of manner defining the verb, is formed by adding the adjective with the final syllable changed to -i.

From The Mafulu Mountain People of British New Guinea by Williamson, Robert Wood

I, except that some of them have imperatives in -i: vaki, þęfi; uni. lifa, sęgja have imper. lif, sęg.

From Icelandic Primer with Grammar, Notes and Glossary by Sweet, Henry

The medieval Cloth Hall and St. Martin’s Church were two of the most prominent monuments in Ypres, Belgium, and among World War I’s early casualties.

From The Wall Street Journal Jul. 15, 2026

Caleb said he was told the Llantrisant Mace was older than most of the Crown Jewels and survived Oliver Cromwell trying to melt down any remaining precious metal bearing Charles I's crest.

From BBC Jun. 18, 2026

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

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

“Now don’t you mess with me this morning,” Elisha said, “because you ain’t got so holy I can’t turn you over my knee. I’s your big brother in the Lord—you just remember that.”

From "Go Tell It on the Mountain" by James Baldwin

Is a debt settlement or debt-management program generally viewed more favorably than a bankruptcy filing, or does it create similar concerns?

From MarketWatch Jul. 17, 2026

Is that going to be an issue here?

From Slate Jul. 17, 2026

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

“That’s a good sign. Is there any reason?”

From "Bye Forever, I Guess" by Jodi Meadows

“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

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

"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

She wrote in big curling script, and she dotted her letter i’s with stars.

From "Hopping Mad (The Hardy Boys: Secret Files, #4)" by Franklin W. Dixon

“I said, ‘Well, if this is so cool to win a title, then I want to win more titles,” he said.

From Los Angeles Times Jul. 18, 2026

But wildfire smoke presents a challenge that is far more complicated than a trade dispute.

From Salon Jul. 18, 2026

The second sector - of which Pouhon is the highlight - is used for recharging so the battery is full again for the long run from Stavelot to the final chicane.

From BBC Jul. 18, 2026

In October's election, Flavio Bolsonaro is expected to face Lula, who is seeking reelection.

From Barron's Jul. 18, 2026

Tuberculosis is a feared disease during this period in history, with good reason.

From "At Last She Stood" by Erin Entrada Kelly

“When we saw something suspicious on her, we took her to the ER, and they didn’t quite know what to make of it,” she said in the video.

From Los Angeles Times Jul. 18, 2026

"We're very positive about where we are now, but those things can't change very quickly, and we need to remember that we're dealing with a fire in a mountain range."

From BBC Jul. 18, 2026

"Whatever the law allows me to do in New York City, that's what we will do," he said.

From Barron's Jul. 18, 2026

But their reaction, she noted, ran along the lines of, “Ah, dang it — but we understand.”

From MarketWatch Jul. 18, 2026

With fruits and vegetables preserved in Mason jars and extra hay for Belle, we can survive winter.

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

"Whatever the law allows me to do in New York City, that's what we will do," he said.

From Barron's Jul. 18, 2026

“It’s something that might be very subtle, and maybe most viewers won’t even notice it, but for me it feels like we’ve closed the distance between the characters.”

From Salon Jul. 18, 2026

Isack, knowing he had a penalty and would be starting at the back, he helped me.

From BBC Jul. 18, 2026

“She’s a very good friend of President Trump,” Giuliani tells me later.

From The Wall Street Journal Jul. 18, 2026

If Ma were here, she’d remind me to eat one and save one for later.

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

“Health authorities are telling us to eat more fruits and vegetables,” Eskin said.

From The Wall Street Journal Jul. 18, 2026

“Some of us are in remission or with no evidence of disease,” Clough testified at a hearing on the bill.

From Los Angeles Times Jul. 18, 2026

But decades of research and community-based prevention efforts tell us otherwise.

From Salon Jul. 18, 2026

Executive producer Sam Talbot said Ethan's role on the series reflected "something that is hugely important to us as a show".

From BBC Jul. 18, 2026

“Good,” Dad says as Aunt J joins us.

From "Split the Sky" by Marie Arnold

A close friend of mine is in her 90s and she is one of the most alive people I know.

From The Wall Street Journal Jul. 18, 2026

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

From Barron's Jul. 17, 2026

Evolution also points to an up to A$60 million rise in sustaining expenditure, and A$130 million-A$160 million of higher mine development costs.

From The Wall Street Journal Jul. 15, 2026

The Venetia mine, in the far north of South Africa, accounts for more than 40% of the country's diamond production and employs more than 4,000 people.

From BBC Jul. 14, 2026

Mutti put her arm through mine as we walked.

From "An Elephant in the Garden" by Michael Morpurgo

Also see: Is it better to spend my savings now so I can delay taking Social Security?

From MarketWatch Jul. 18, 2026

“For example, if Kensho-san says something in the character Yuru, and I hear that, I actually adjust my performance a little bit to match some of his tempo or timing,” she said.

From Salon Jul. 18, 2026

I will be looking in my mirrors tomorrow.

From BBC Jul. 18, 2026

“The best networking I ever did in my life was at the Club World Cup last year. I interviewed President Trump and I met Gianni and Ronaldinho and Ronaldo and all these amazing people.”

From The Wall Street Journal Jul. 18, 2026

“Seems like I ought to help. Become a land rush man. Set aside my guns. California and the Pacific Ocean aren’t going anywhere.”

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

“We will do everything in our power to seek justice for the victims.”

From Los Angeles Times Jul. 18, 2026

"A terrible night, terrible events for our company and for our country. It is a pain that cannot be put into words," said Wildberries CEO Tatiana Kim.

From Barron's Jul. 18, 2026

We already know that chronic stress takes years off our lives.

From The Wall Street Journal Jul. 18, 2026

For some of us, it’s just enough to get by with a little help from our daemons.

From Salon Jul. 18, 2026

I do remember our mom in this very room, cooking up a storm of delicious meals.

From "Split the Sky" by Marie Arnold

Dogs in art, Mr. Laqueur suggests, “bring their world into ours, which is perhaps how they make us feel less lonely as a species.”

From The Wall Street Journal Jul. 17, 2026

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

"We know everyone in this city, this city is ours," he boasted to a contact in a recording shared with the BBC.

From BBC Jul. 4, 2026

“The wolves have been our protectors while we were in their native habitat,” she thought, “but if they are seen in ours, it will not be so easy for us to protect them.”

From "The Unseen Guest" by Maryrose Wood

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