Oldest sister Synonyms

Oldest replaced

Synonyms for phrase

OS abbreviation

OS is an abbreviation for Oldest Sister
What does OS stand for?
OS stands for "Oldest Sister"

Sister replaced

Definitions for Sister


  • (noun) a female person who has the same parents as another person
  • (noun) a female person who is a fellow member of a sorority or labor union or other group
  • (noun) ( slang ) sometimes used as a term of address for attractive young women