1. (noun) sister, sis
a female person who has the same parents as another person
Synonyms: baby, sister, babe, sis Antonyms: brother, blood brother
2. (noun) Sister
(Roman Catholic Church) a title given to a nun (and used as a form of address)
Synonyms: baby, babe, sis Antonyms: brother, blood brother
3. (noun) sister
a female person who is a fellow member of a sorority or labor union or other group
Synonyms: baby, babe, sis Antonyms: blood brother, brother
4. (noun) baby, babe, sister
(slang) sometimes used as a term of address for attractive young women
Synonyms: baby, infant, sis, child, babe, sister Antonyms: brother, blood brother
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