a female person who has the same parents as another person
your foster sister is a female who is not a daughter of your parents but who is raised by your parents
a sister who has only one parent in common with you
the sister of your spouse
a female person who is a fellow member of a sorority or labor union or other group
(Roman Catholic Church) a title given to a nun (and used as a form of address)
(slang) sometimes used as a term of address for attractive young women
