foster sister

noun

1. a girl brought up with another child of different parents.

Word History and Origins

Origin of foster sister¹

First recorded in 1640–50

Example Sentences

When footage of Nazi soldiers appeared on television, Mr. Kertzer and his older sister, Ruth, would leap to switch the set off to protect their foster sister, Eva.

From New York Times

Aside from Harrison, who is played in “New Blood” by Jack Alcott, much of that continuity arrives in the ghostly form of Jennifer Carpenter’s Debra, Dexter’s foul-mouthed foster sister.

From New York Times

Isabella's story is about what life is like a foster sister.

From BBC

Alexa had learned to speak English, bonded with her foster sisters and captured their hearts.

From Washington Times

When Pecola gets her period in The Bluest Eye, her foster sisters tell her that she could get pregnant now.

From Literature