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• is
  is

  verb

  3rd person singular present indicative of be.
• IS
  IS

  abbreviation

  information security.
• is-
  is-

  variant of iso- before a vowel.
• is.
  is.

  abbreviation

  island.
• Is.
  Is.

  abbreviation

  Isaiah.

is

¹ American  

[iz] / ɪz /

verb

1. 3rd person singular present indicative of be.

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idioms

1. as is. as.

IS ² American  

abbreviation

1. information security.

2. Islamic State. See ISIS.

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is- ³ American  

1. variant of iso- before a vowel.

   isallobar.

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is. ⁴ American  

abbreviation

1. island.

2. isle.

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Is. ⁵ American  

abbreviation

1. Isaiah.

2. island.

3. isle.

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Is. ¹ British  

abbreviation

1. Also: Isa.  Bible Isaiah

2. Island(s) or Isle(s)

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IS ² British  

abbreviation

1. Iceland (international car registration)

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is ³ British  

/ ɪz /

verb

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

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is ⁴ British  

abbreviation

1. Iceland

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is- ⁵ British  

combining form

1. variant of iso-

   isentropic

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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

Now, an international team of scientists has discovered that one of the region's most mysterious venomous snakes is not a single species after all.

From Science Daily • May 26, 2026

"The terminology is so sprawling that you could almost make a new language from these rock names," said Gibson.

From Science Daily • May 26, 2026

One way to think about the system is as a group of specialized tasters sampling different aspects of the same complex mixture.

From Science Daily • May 26, 2026

Researchers note that recognizing hidden biodiversity is essential for conservation efforts.

From Science Daily • May 26, 2026

Conservation of angular momentum is your best friend.

From "Legendary Frybread Drive-In" by Cynthia Leitich Smith