sister
noun(sis-ter)
a female person who has the same parents as another person
Examples:
My sister married a musician.
sister
noun(sis-ter)
a female person who is a fellow member of a sorority or labor union or other group
Examples:
None of her sisters would betray her.
sister
noun(sis-ter)
(Roman Catholic Church) a title given to a nun (and used as a form of address)