Definitions
1.nounLayperson, someone who is not an ordained cleric or member of the clergy.
2.noun(by extension) Someone who is not a professional in a given field."Carmen is not a professional anthropologist, but strictly a layman."
3.nounA common person.
4.nounA person who is untrained or lacks knowledge of a subject.
5.nounA generally ignorant person.
6.nounLay-sister or lay-brother, person received into a convent of monks, following the vows, but not being member of the order.