sister

1 sister /ˈsɪstɚ/ noun
plural sisters
1 sister
/ˈsɪstɚ/
noun
plural sisters
Britannica Dictionary definition of SISTER
1 
[count] : a girl or woman who has one or both of the same parents as you
— compare half sister, sister-in-law, stepsister
2 
informal — used when talking to a woman
3 
[count] or Sister : a member of a religious community of women : nun — often used as a title — abbreviation Sr.
4 
[count] : a woman who is from the same group or country as you
5 
[count] US, informal : a black woman — used especially by African-Americans
6 
[count] chiefly British or Sister : a nurse in a hospital ward or clinic
2 sister /ˈsɪstɚ/ adjective
2 sister
/ˈsɪstɚ/
adjective
Britannica Dictionary definition of SISTER
always used before a noun
: belonging to the same kind or group : having similar qualities or characteristics