Sister Definition

sĭstər
sisters
noun
sisters
A woman or girl related to one by having a parent in common; half sister.
Webster's New World
A woman or girl as she is related to the other children of her parents.
Webster's New World
A girl or woman who shares a common ancestry, allegiance, character, or purpose with another or others, specifically:
American Heritage
A stepsister.
Webster's New World
A foster sister.
Webster's New World
Synonyms:
babebabysiswomansiblingnunfriendfemalecompanionco-workerassociatedeaconessmember of a sisterhoodfemale siblingfoster-sister
Antonyms:
brother
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adjective
Related or seeming to be related as sisters.
Webster's New World
Of or being one of an identical, related, or homologous pair.
Sister chromatids.
American Heritage Medicine
Synonyms:
siblingsisterly

Other Word Forms of Sister

Noun

Singular:
sister
Plural:
sisters

Origin of Sister

  • Middle English from Old Norse systir swesor- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

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