- one's stepfather's or stepmother's daughter by a previous marriage.
Origin of stepsister
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for stepsister
A stepsister riding in the car with him during a trip home to Massachusetts also perished.Is This Caylee's Daddy?
June 29, 2011
She was the only relation I had, except my stepsister, and she was off travelling.The Prisoner
She was surprised and almost alarmed at the effect upon her stepsister.A True Friend
"I'm afraid I was looking at the horses," cut in her stepsister.
Yet I think she would have stayed if her stepsister had not urged.
But while she was doing so her stepsister gave her a push, and she fell backward into the water.The Fairy Ring
- a daughter of one's stepmother or stepfather by a union with someone other than one's father or mother respectively
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