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is

1 American  
[iz] / ɪz /

verb

  1. 3rd person singular present indicative of be.


idioms

  1. as is. as.

IS 2 American  

abbreviation

  1. information security.

  2. Islamic State. See ISIS.


is- 3 American  
  1. variant of iso- before a vowel.

    isallobar.


is. 4 American  

abbreviation

  1. island.

  2. isle.


Is. 5 American  

abbreviation

  1. Isaiah.

  2. island.

  3. isle.


Is. 1 British  

abbreviation

  1. Also: IsaBible Isaiah

  2. Island(s) or Isle(s)

"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

IS 2 British  

abbreviation

  1. Iceland (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

is 3 British  
/ ɪz /

verb

  1. a form of the present tense (indicative mood) of be 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

is 4 British  

abbreviation

  1. Iceland

"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

is- 5 British  

combining form

  1. variant of iso-

    isentropic

"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

Etymology

Origin of is

First recorded before 900; Middle English, Old English; cognate with Dutch is, Old Norse es, er, German, Gothic ist, Latin est, Greek estí, Old Church Slavonic jestĭ, Sanskrit asti

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.

Album cuts like “$T. LOSER” and “WHAT IS IT LIKE, TO BE LIKED?” find Slayyyter caught up comparing herself to other artists.

From Salon • Jun. 5, 2026

Once in control of swathes of Syria and Iraq, IS was territorially defeated in 2019 in a battle spearheaded by Kurdish-led forces with support from a US-led international coalition.

From Barron's • May 28, 2026

Even the property’s parcel is exceptional, notes listing agent Sam Coleman of IS Luxury Real Estate.

From MarketWatch • May 21, 2026

The original 1969 “WAR IS OVER! If You Want It” L.A. billboard, which also appeared in Times Square and was printed in the New York Times, was not well documented, Loyer notes.

From Los Angeles Times • May 14, 2026

She didn’t wear a costume—just a button that had the words “This IS my costume” printed on it.

From "The World According to Humphrey" by Betty G. Birney

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