sister

noun
sis·​ter | \ ˈsi-stər How to pronounce sister (audio) \

Definition of sister

1 : a female who has one or both parents in common with another

2 often capitalized

a : a member of a women's religious order (as of nuns or deaconesses) especially : one of a Roman Catholic congregation under simple vows
b : a girl or woman who is a member of a Christian church
3a : a girl or woman regarded as a comrade
b : a girl or woman who shares with another a common national or racial origin especially : a black girl or woman
4 : one that is closely similar to or associated with another sister cities
5 chiefly British : nurse
6a : girl, woman
b : person usually used in the phrase weak sister
7 : a member of a sorority

Keep scrolling for more

Examples of sister in a Sentence

The sisters live in the convent.

Recent Examples on the Web

Neither of the Giannulli sisters had rowed on their high school’s crew team. Martha Ross, The Mercury News, "Is this Lori Loughlin’s ‘Hail Mary?’ Her lawyers want FBI files on other parents," 13 June 2019 Sigh was married to Patrick’s sister, the Globe has reported. John R. Ellement, BostonGlobe.com, "Milton man convicted of raping estranged wife, launching kidnapping plot," 13 June 2019 In 2014, one of her sisters died in El Salvador and another was diagnosed with cancer, but going back was out of the question. Jenna Krajeski, The New Yorker, "A Victim of Terrorism Faces Deportation for Helping Terrorists," 11 June 2019 Kylie attended a party hosted by Drake, and ran into exes of her sisters in Hollywood, E! Meagan Fredette, refinery29.com, "Kylie Jenner Proves She's An Expert At Avoiding Ex Drama At Drake's Party," 10 June 2019 Taplin’s skirt belonged to her sister, who had worn it to her own wedding. SFChronicle.com, "City Hall weddings: Public displays of devotion," 7 June 2019 The former Inquirer reporter reads from her latest novel, following the lives of two sisters from the 1950s to right now. John Timpane, https://www.inquirer.com, "Readings by authors in Philly this summer: Jennifer Weiner, Richard Russo, and more," 5 June 2019 Too frightened to tell their mother what was going on, the boys finally told Margaret Gallant, one of Ms. Dussourd’s sisters, who then told Ms. Dussourd. New York Times, "Maryetta Dussourd, 74, Dies; Raised Early Alarm on Abusive Priests," 3 June 2019 Kylie JennerInstagram Here's another angle of the sisters: Khloe KardashianInstagram Wait, did Kylie put on a wig or fake bangs at some point during the night?? Katherine J. Igoe, Marie Claire, "The Kardashians Match in Pink Outfits at the Over-the-Top Launch of Kylie's Skincare Line," 22 May 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sister.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of sister

before the 12th century, in the meaning defined at sense 1

History and Etymology for sister

Middle English suster, sister, partly from Old English sweostor and partly from Old Norse systir sister; akin to Latin soror sister, Sanskrit svasṛ

Keep scrolling for more

Learn More about sister

Statistics for sister

Last Updated

17 Jun 2019

Look-up Popularity

Time Traveler for sister

The first known use of sister was before the 12th century

See more words from the same century

Keep scrolling for more

More Definitions for sister

sister

noun

English Language Learners Definition of sister

: a girl or woman who has one or both of the same parents as you
informal used when talking to a woman
: a member of a religious community of women

sister

noun
sis·​ter | \ ˈsi-stər How to pronounce sister (audio) \

Kids Definition of sister

1 : a female person or animal related to another person or animal by having one or both parents in common
2 : a member of a religious society of women : nun
3 : a woman related to another by a common tie or interest

Other Words from sister

sisterly adjective

sister

noun
sis·​ter | \ ˈsis-tər How to pronounce sister (audio) \

Medical Definition of sister

chiefly British
: a head nurse in a hospital ward or clinic broadly : nurse

Keep scrolling for more

More from Merriam-Webster on sister

Rhyming Dictionary: Words that rhyme with sister

Spanish Central: Translation of sister

Nglish: Translation of sister for Spanish Speakers

Britannica English: Translation of sister for Arabic Speakers

Comments on sister

What made you want to look up sister? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a device or gadget

Get Word of the Day daily email!

Test Your Vocabulary

Words for Summer: A Quiz

  • a closeup of a sunflower
  • Which of the following words means “of or relating to summer”?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Dictionary Devil

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!