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.
stepsister.
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.
adjective
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.
Origin of sister
First recorded before 900; Middle English (noun) from Old Norse systir; cognate with Old English sweoster, Dutch zuster, German Schwester, Gothic swistar; akin to Serbo-Croatian sèstra, Lithuanian sesuõ, Latin soror (from unattested swesor ), Old Irish siur, Welsh chwaer, Sanskrit svasar “sister,” Greek éor “daughter, niece”
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.
Toward a queer Disney canon|Emily VanDerWerff|September 4, 2020|Vox
The unit is used to attack foreign networks, and either it or a sister organization was involved in the Sony hack.
U.S. Should Make North Korea Pay for Sony Hack|Gordon G. Chang|December 18, 2014|DAILY BEAST
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|DAILY BEAST
Because especially my sister is not capable of doing the stuff that he is accusing her of doing.
Beaten By His Church for Being Gay|Justin Jones|December 16, 2014|DAILY BEAST
She told TIME magazine in 1987 that Crawford was the “sister I never had.”