1. plural of sister; female siblings or women who share the same parents
2. female members of a religious community or order
Usage: religious
3. women who share a close bond or common cause
Usage: informal

Examples

• The two sisters look very much alike.
• She has three older sisters and one younger brother.
• The sisters at the convent devoted their lives to helping the poor.
• Sister Mary and Sister Catherine taught at the local school.
• The women called themselves sisters in the fight for equality.
• My best friends are like sisters to me.
• All five sisters gathered for their mother’s birthday.