Bedeutung von “sister” — Learner’s Dictionary

sister

noun [ C ] us uk /ˈsɪstər/
Jane is such a good role model for her younger sister.When Jo told me she had a twin sister, everything fell into place.I'm expecting a letter from my sister.Susan is the eldest of three sisters.Brothers and sisters often argue.
RELATIVE

A1 a girl or woman who has the same parents as you:

an older/younger sister
my big/little sister
RELIGION also Sister

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

Sister Bridget
NURSE also Sister

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

(Definition von “sister” aus dem Cambridge Learner's Dictionary © Cambridge University Press)