Any woman religious, in popular speech; strictly, the title applies only to women religious belonging to institutes whose members never professed solemn vows Most of the institutes whose members are properly called Sisters were established during and since the 19th century Women religious with solemn vows, or belonging to institutes whose members formerly professed solemn vows, are properly called nuns
A woman who is closely allied to, or assocciated with, another person, as in the sdame faith, society, order, or community
a female person who is a fellow member of a sorority or labor union or other group; "none of her sisters would betray her"
Of or relating to an entity that has a special or affectionate relationship with another