Sister (plural sisters or (archaic in most senses) sistren) a daughter of the same parents as another person; A female person having the same parents as another person 2. The meaning of sister is a female who has one or both parents in common with another.
Margrethe ii elizabeth ii hires stock photography and images Alamy
A girl or woman who treats you. A girl or woman who has the same parents as another person: How to use sister in a sentence.