layman

noun, plural lay·men.

1. a person who is not a member of the clergy; one of the laity.
2. a person who is not a member of a given profession, as law or medicine.

noun plural -men

1. a man who is not a member of the clergy
2. a person who does not have specialized or professional knowledge of a subjectscience for the layman

n.“non-cleric,” early 15c., from lay (adj.) + man (n.). Meaning “outsider, non-expert” (especially in regards to law or medicine) is from late 15c. Related: Laymen.