sister

pluralsisters

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.