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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.

Keep Reading on Vocabulary.com

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:

After a court security officer told him that he and another line sitter couldn’t swap places, the pair decided to head in anyway and see the spectacle for themselves.

From Los Angeles Times ● Sep. 2, 2026

But that friend, performance artist Leigh Bowery, had posed for Freud and thought she’d make a great sitter because she was reliable and adventurous, she said, and made the introduction.

From The Wall Street Journal ● Jun. 24, 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

One of Woolner’s cousins, a Washington lawyer, employs Maggie both at her office and as a house sitter.

From "Class Matters" by The New York Times

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 Holiday Sitter" premieres Sunday, Dec. 11 at 8 p.m. on The Hallmark Channel.

From Salon ● Dec. 11, 2022

De Sitter space describes an accelerating and expanding universe much like our own.

From Scientific American ● Jan. 18, 2022

He rode towards the north out of the valley along through which the Sitter rushes; he saw the Bodensee and the Rhine, and thought of the ablativus!

From Ekkehard. Vol. II (of II). A Tale of the Tenth Century by Joseph Victor von Scheffel

I gave it four dates and times, and my preferred sitters.

From The Wall Street Journal ● Sep. 29, 2026

She still does a lot of the pet sitting herself, but she’s trying to pull back and hire more sitters.

From MarketWatch ● Sep. 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

Many of the old tree sitters — white-haired and brimming with stories of Bari — have come out of the woodwork for the latest battle.

From Los Angeles Times ● May 10, 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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