stepsister

[ step-sis-ter ]
/ ˈstɛpˌsɪs tər /

noun

one's stepfather's or stepmother's daughter by a previous marriage.

Origin of stepsister

late Middle English word dating back to 1400–50; see origin at step-, sister

Example sentences from the Web for stepsister

British Dictionary definitions for stepsister

stepsister
/ (ˈstɛpˌsɪstə) /

noun

a daughter of one's stepmother or stepfather by a union with someone other than one's father or mother respectively