1. layperson, someone who is not an ordained cleric or member of the clergy
  2. by analogy, someone who is not a professional in a given field
    Carmen is not a professional anthropologist, but strictly a layman.
    Let me explain it to you in layman's terms.
  3. a common person
  4. a person who is untrained or lacks knowledge of a subject
  5. a generally ignorant person
  6. lay-sister or lay-brother, person received into a convent of monks, following the vows, but not being member of the order

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