sister meaning and definition

SISTER noun

Definition of sister (noun)

1. a female person who has the same parents as another person
   • "my sister married a musician"
   • synonyms: sis
   • antonym: blood brother
2. (Roman Catholic Church) a title given to a nun (and used as a form of address)
   • "the Sisters taught her to love God"
3. a female person who is a fellow member of a sorority or labor union or other group
   • "none of her sisters would betray her"
4. (slang) sometimes used as a term of address for attractive young women
   • synonyms: babe, baby