noun

 

relative a girl or woman who has the same parents as you

an older/younger sister

 

religion a nun (= woman who lives in a female religious group)

Sister Bridget

 

nurse a female nurse in the UK who is responsible for a hospital ward (= an area of a hospital containing beds for ill people)

I asked Sister if he would be able to go home soon.

 

member a woman who is a member of the same race, religious group, organization, etc