a female offspring having both parents in common with another offspring; female sibling.
Also called half sister. a female offspring having only one parent in common with another offspring.
a female friend or protector regarded as a sister.
a thing regarded as feminine and associated as if by kinship with something else: The ships are sisters.
a female fellow member, as of a church.
a female member of a religious community that observes the simple vows of poverty, chastity, and obedience.
British. a nurse in charge of a hospital ward; head nurse.
Informal. a term used to refer to or address a fellow Black woman; soul sister.
a woman who supports, promotes, or participates in feminism.
Informal. a form of address used to a woman or girl, especially jocularly or contemptuously: Listen, sister, you've had enough.
being or considered a sister; related by or as if by sisterhood: sister ships.
having a close relationship with another because of shared interests, problems, or the like: We correspond with school children in our sister city.
Biochemistry. being one of an identical pair.
- sis·ter·less, adjective
- sis·ter·like, adjective
- non·sis·ter, noun, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use sister in a sentence
Osaka’s win also served as yet another reminder of the Williams’ sisters legacy, even as Serena Williams was knocked out in the tournament’s semifinal on Thursday.Naomi Osaka wins her second U.S. Open title with a powerful message | ehinchliffe | September 14, 2020 | Fortune
My mom gave me a key to the house, showed me how to take three trains and a bus to the city and back, and then showed me how to do it with my sister, because I had to take my sister with me as well, but that’s when I knew she knew I really wanted it.Sitcom Queen Tichina Arnold Got Funny to Avoid Spankings | Pallabi Munsi | September 10, 2020 | Ozy
You think it happens a certain way, and then you look at a sister group and it doesn’t work that way at all.How Two Became One: Origins of a Mysterious Symbiosis Found | Viviane Callier | September 9, 2020 | Quanta Magazine
ByteDance already has its eyes on that business and is pushing TikTok and Douyin, its sister site in China, to add more e-commerce.TikTok: Everything to know about tech’s biggest soap opera | Danielle Abril | September 5, 2020 | Fortune
Because of the sister story being the focus, Elsa doesn’t have a handsome doofus to follow her around and try to win her love, unlike her sister Anna, who finds herself at the center of a genuine love triangle.
Just a week after her divorce, she was invited to a wedding by her sister-in-law.
Kirke, the 23-year-old younger sister of Girls star Jemima Kirke, is a good example of that herself.‘Mozart in the Jungle’: Inside Amazon’s Brave New World of Sex, Drugs, and Classical Music | Kevin Fallon | December 23, 2014 | THE DAILY BEAST
In the post-Kefauver era of the early 1950s, it had many advantages over its distant desert sister.Will Hyman Roth Return to Havana With Normalized Relations? | John L. Smith | December 18, 2014 | THE DAILY BEAST
The unit is used to attack foreign networks, and either it or a sister organization was involved in the Sony hack.
She and her sister went into business together in 1997, opening Curve Salon after a career in media.Goodbye To A Natural Hair Guru: Miss Jessie's Cofounder Titi Branch Dead At 45 | Danielle Belton | December 16, 2014 | THE DAILY BEAST
To think,” said the younger Englishwoman to her sister, “of this wee mite travelling about in an open motor!The Joyous Adventures of Aristide Pujol | William J. Locke
She and her younger sister, Janet, had quarreled a good deal through force of unfortunate habit.The Awakening and Selected Short Stories | Kate Chopin
“My sister is passionately fond of children,” said the elder lady, in smiling apology.The Joyous Adventures of Aristide Pujol | William J. Locke
In the spring of 1868 he was taken by his mother for a visit to England, and there, in the same year, his sister was born.Kipling Stories and Poems Every Child Should Know, Book II | Rudyard Kipling
A little boy had been quarrelling with his sister named Muriel just before going to bed.Children's Ways | James Sully
British Dictionary definitions for sister
a female person who belongs to the same group, trade union, etc, as another or others
informal a form of address to a woman or girl, used esp by Black people in the US
a senior nurse
mainly RC Church a nun or a title given to a nun
a woman fellow member of a Church or religious body
(modifier) belonging to the same class, fleet, etc, as another or others: a sister ship
(modifier) biology denoting any of the cells or cell components formed by division of a parent cell or cell component: sister nuclei
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