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

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Examples of sister in a Sentence

The sisters live in the convent.

Recent Examples on the Web

Source: Audit Analytics With this in mind, Coty’s next big idea needs to look less like CoverGirl and more like Kylie Jenner, the youngest of the five Kardashian-Jenner sisters. John D. Stoll, WSJ, "What Kylie Jenner Can Teach Us About M&A," 12 July 2019 Of course, everybody loved me and pampered me as the youngest, and also as the little sister. Svetlana Alexievich, Vox, "“They lay pink on the cinders”," 12 July 2019 Back in 2008, the sisters were young teenagers trying to get their budding careers off the ground. Claire Dodson, Teen Vogue, "Vanessa and Laura Marano Open Up About Their New Movie "Saving Zoe" and Play "I Dare You"," 12 July 2019 Supporters of the sisters — Maria, Angelina and Krestina Khachaturyan — say they were driven to violence by years of abuse and should not be prosecuted for murder. Andrew Higgins, New York Times, "Ignored at Home, Battered Russian Women Take Cases to Europe," 11 July 2019 The sister of Saudi Arabia’s crown prince is being tried in absentia in Paris over the alleged 2016 beating of a workman at her family’s apartment. Washington Post, "Saudi princess tried in absentia for alleged Paris beating," 10 July 2019 The Bessette sisters shared a love of fashion, and Arndt believes they might one day have gone into business together. Adrienne Gaffney, Town & Country, "The Other Passenger: Who Was Lauren Bessette?," 9 July 2019 Playing the Festival for the very first time, the soul sisters of Nigerian descent possessed a sound reminiscent of R&B’s glory days during the early-to-mid 90s. Okla Jones, Essence, "The Soulful Sounds Of R&B's Sultry Duo VanJess Heat Up The Stage At The 2019 Essence Festival," 9 July 2019 In Greek mythology, Artemis was the sister of Apollo as well as goddess of the Moon. Wendy Whitman Cobb, The Conversation, "Women are less supportive of space exploration – getting a woman on the Moon might change that," 9 July 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.

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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

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Statistics for sister

Last Updated

15 Jul 2019

Look-up Popularity

Time Traveler for sister

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

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More Definitions for sister



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


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


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

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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

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an act or instance of editing or removing

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