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:
Antonyms:
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
Other Word Forms of Sister
Noun
Singular:
sister
Plural:
sistersOrigin 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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