noun:a female sibling; a woman who shares at least one parent with another person
My younger sister is starting college this fall.
noun:a female fellow member of a religious community, church, or other organization
Sister Mary will be leading the prayer service today.
noun:a senior female nurse, typically in charge of a ward
The sister on the night shift is very experienced and kind.
adjective:used to describe a thing that is of the same type or has the same purpose as another
The two charities are sister organizations dedicated to the same cause.
