Definitions
1.nounA member of a Christian religious community of women who live by certain vows and usually wear a habit, (specifically) those living together in a cloister.
2.noun(by extension) A member of a similar female community in other confessions.
3.nounA prostitute.
4.nounA kind of pigeon with the feathers on its head like the hood of a nun.
5.nounThe fourteenth letter of many Semitic alphabets/abjads (Phoenician, Aramaic, Hebrew, Syriac, Arabic and others).