修女（英語：Nun），是天主教、東正教、聖公會以及信義宗的女性修行人員，通常須發三愿（即神貧、貞潔、服從），从事祈祷和协助神父进行传教。
A member of a Christian religious community of women who live by certain vows and usually wear a habit, (Roman Catholicism, specifically) those living together in a cloister.