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Definition of stepsister

stepsister

/ˈstɛpˌsɪs.tɚ/
step · sis · ter
Plural:stepsisters
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stepsister Lexical Profile

stepsister Game Scores & Validity

• noun

1

A daughter of one's stepparent by a previous marriage or relationship, with whom one shares no biological parents.

Example

"After her mother remarried, she quickly became close friends with her new stepsister."

Synonyms
View all synonyms for stepsister
Antonyms
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Word Nuance & Usage

Do not confuse 'stepsister' with 'half-sister': a stepsister shares no biological parents and is related solely through the marriage of one's parent to her parent, whereas a half-sister shares one biological parent.

• Nearby Words

stepper
steppingstone
steprelationship
stepsister
stepson
stepstool
stepwise

Word Origin & Etymology

From Middle English stepsuster, from Old English steopsweostor, combining steop- (originally denoting bereavement or orphanhood, related to Old English astiepan, meaning 'to bereave') and sweostor ('sister').

Cite this Entry

Wordmom. (2026). Definition of Stepsister. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/stepsister
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