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  • sitter
    sitter
    noun
    a person who sits.
  • Sitter
    Sitter
    noun
    Willem de 1872–1934, Dutch astronomer and mathematician.
Synonyms

sitter

1 American  
[sit-er] / ˈsɪt ər /

noun

sitters plural
  1. a person who sits.

  2. a brooding hen.

  3. a person who stays with young children while the parents go out; baby-sitter.

  4. a person who provides routine or custodial care temporarily or part-time, as for an elderly person or a pet whose owner is on vacation.

  5. Slang. the buttocks; rump.


Sitter 2 American  
[sit-er] / ˈsɪt ər /

noun

  1. Willem de 1872–1934, Dutch astronomer and mathematician.


sitter 1 British  
/ ˈsɪtə /

noun

  1. a person or animal that sits

  2. a person who is posing for his or her portrait to be painted, carved, etc

  3. a broody hen or other bird that is sitting on its eggs to hatch them

  4. (in combination) a person who looks after a specified person or thing for someone else

    flat-sitter

  5. short for baby-sitter

  6. anyone, other than the medium, taking part in a seance

  7. anything that is extremely easy, such as an easy catch in cricket

"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

Sitter 2 British  
/ ˈsɪtə /

noun

  1. Willem de (ˈwɪləm də). 1872–1934, Dutch astronomer, who calculated the size of the universe and conceived of it as expanding

"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

Other Word Forms

Noun Inflected Forms

Etymology

Origin of sitter

Middle English word dating back to 1300–50; see origin at sit 1, -er 1

Explanation

Don’t squash the children! A sitter can be anyone who sits — in a chair, on the floor, or anywhere else — but it’s often short for babysitter. They don’t actually sit on the babies, though. We hope. In addition to the person who sits or models for an oil painter, a sitter can also be someone who watches children as a paid job. It's short for babysitter: "Good news, guys, we're having the nice sitter tonight, the one who lets us stay up past bedtime!" The origin of sitter and babysitter isn't completely clear, but some experts guess the sit part comes from birds sitting on their eggs before they hatch.

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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:

Against a somber, black background, the sitter comes vividly alive.

From The Wall Street Journal Jun. 5, 2026

A plant sitter who eats her clients’ plants while insisting she’s very good at her job.

From Los Angeles Times May 14, 2026

Caley could not take time off immediately, so the two were searching for a last-minute sitter.

From MarketWatch May 13, 2026

"We made arrangements in terms of time off work. We've got a cat sitter sorted and everything else," the 63-year-old told the BBC.

From BBC Apr. 22, 2026

Our interest arises no doubt from the remnant of a primitive belief that an image captures not merely the likeness but also the soul of a sitter.

From "History of Art, Volume 1" by H.W. Janson

Zakrzewski worked as a professional nanny, branding himself as “the original Sitter Buddy” on his website.

From Los Angeles Times Nov. 18, 2023

Their paper 'Static Black Binaries in de Sitter Space' is published in the journal Physical Review Letters and reviewed as a Viewpoint article.

From Science Daily Oct. 19, 2023

The idea of chosen family is essential to "The Holiday Sitter," where several characters are expanding their family or hope to through adoption.

From Salon Dec. 11, 2022

“We live in something much closer to de Sitter space.”

From Scientific American Jan. 18, 2022

I heard again the names of Einstein and De Sitter that I had heard before, repeated frequently by these men as they disputed with Rastin and Thicourt.

From The Man Who Saw the Future by Morey, Leo

She doesn’t love the nuisance of hiring pet sitters when they travel.

From The Wall Street Journal Jul. 6, 2026

We got cat sitters, we both took days off from work, the whole thing.

From Los Angeles Times Jun. 23, 2026

Chants of "Let's go Knicks" rippled through the dense crowd, made up of some who paid hundreds of dollars for line sitters to wait overnight and save them a space to watch the procession.

From Barron's Jun. 18, 2026

There are hunters and prey, parasites and hosts, swimmers and sitters, and there are those with varied diets while others photosynthesize.

From Science Daily May 7, 2026

For a long message, the leader, assisted by the circle of sitters, guessed at words to help the communication along.

From "American Spirits" by Barb Rosenstock

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