• WordNet 3.6
    • n foster-sister your foster sister is a female who is not a daughter of your parents but who is raised by your parents
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Century Dictionary and Cyclopedia
    • n foster-sister A female child, not a sister, reared with another child by the same person.
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Chambers's Twentieth Century Dictionary
    • Foster-sister one brought up as a sister by the same parents, but not a sister by birth
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Chambers's Twentieth Century Dictionary
A.S. fóstrian, to nourish, fóstor, food.


In literature:

There was a man called Asmund, who is said to have been King Svein's sister's son, and his foster-son.
"Heimskringla" by Snorri Sturlason
Frank Fowler, a poor boy, bravely determines to make a living for himself and his foster-sister Grace.
"Gascoyne, The Sandal Wood Trader" by R. M. Ballantyne
Her sisters fostered this dislike with the tales they brought in from the outside world.
"The Honorable Miss" by L. T. Meade
Then comes her foster-sister's clear enigma and tells intelligibly whose her heart is.
"Tales from the Hindu Dramatists" by R. N. Dutta
The children were left to the fostering care of her hated sister.
"Notable Women of Olden Time" by Anonymous
And since he had lived with his foster sister Leon had perceptibly grown brighter and quicker.
"Ten Tales" by François Coppée
Jessica Bright's radiant delight at beholding the face of her foster sister, Mabel Allison, can be better imagined than described.
"Grace Harlowe's Third Year at Overton College" by Jessie Graham Flower
They made way for me because I was their foster sister.
"The Promised Land" by Mary Antin
Courtenay's companion, little Eugenia Gonzalez, was a striking contrast to her foster-sister.
"The Rover's Secret" by Harry Collingwood
Elsie, cleared of any kinship to Farley, at once became in his thoughts a being of finer nature than her foster-sister.
"Bloom of Cactus" by Robert Ames Bennet

In poetry:

This First Lieutenant proved to be
His foster-sister MAY,
Who went to sea for love of he
In masculine array.
"The Martinet" by William Schwenck Gilbert

In news:

Maricopa County Sheriff's Office is looking for two young sisters who were reported missing Wednesday from their foster home in Youngtown.
Maricopa County authorities are searching for two young sisters who apparently ran away from their foster home in Youngtown, west of Phoenix.
Sisters, Novella Overton, Juanelle Foster, Louella Carlton and Charlotte Brummett.
Hospital District commissioners J. Michael Edwards, far left, and George Foster listen on as Chairwoman Lenore Bayuk reads a letter from PeaceHealth's Sister Kathleen Pruitt, at the commission's Sept 18 meeting.
If so, we know you stopped by the Sister 2 Sister area to snap a photo with Jamie Foster Brown.
Interview by Jamie Foster Brown (Excerpted from the August 2009 issue of Sister 2 Sister magazine).
2 runaway foster home sisters located.