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Definitions

stepsister

[step-sis-ter] / ˈstɛpˌsɪs tər /
NOUN
kinsman
Synonyms
STRONG
agnate aunt blood brother-in-law cognate connection cousin father father-in-law folk folks grandparents in-laws kin kinsperson kinswoman mother mother-in-law nephew niece relation sib sibling sister-in-law stepbrother stepparent uncle
WEAK
clansperson great-grandparents
NOUN
kinswoman
Synonyms
STRONG
agnate aunt blood brother-in-law cognate connection cousin father father-in-law folk folks grandparents in-laws kin kinsman kinsperson mother mother-in-law nephew niece relation sib sibling sister-in-law stepbrother stepparent uncle
WEAK
clansperson great-grandparents
NOUN
relative
Synonyms
STRONGEST
aunt cousin father folk mother niece sibling uncle
STRONG
agnate blood brother-in-law cognate connection father-in-law folks grandparents in-laws kinsperson mother-in-law nephew relation sib sister-in-law stepbrother stepparent
WEAK
clansperson great-grandparents

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

You will have to watch your stepsister like a hawk.

From MarketWatch • Feb. 13, 2026

I could relate to those feelings of shame and despair she felt when she realized she was the stepsister.

From Salon • Apr. 18, 2025

And all the dreamier if they put that team in her town — and not that stepsister city across the river.

From Los Angeles Times • Apr. 8, 2025

Baena's surviving family includes his mother Barbara Stern and stepfather Roger Stern; father Scott and stepmother Michele Baena; brother Brad Baena; stepsister Bianca Gabay and stepbrother Jed Fluxman.

From BBC • Jan. 7, 2025

But Ash detected an undercurrent of anxiety in her stepsister, and she could not help it — she began to feel sorry for her.

From "Ash" by Malinda Lo