lay·man 
/ˈleɪmən/ noun
plural lay·men /-mən/ /ˈleɪmən/ noun [count] 1 : a person who is not a member of a particular profession
▪ For a layman, he knows a lot about the law. ▪ a medical journal written in language that is clear to the layman [=clear to someone who is not a medical professional] ▪ The process was explained to us in layman's terms. [=in simple language that anyone can understand] 2 : a person who belongs to a religion but is not a priest, minister, etc.
▪ He's an important layman in his church. — compare laity
▪ For a layman, he knows a lot about the law. ▪ a medical journal written in language that is clear to the layman [=clear to someone who is not a medical professional] ▪ The process was explained to us in layman's terms. [=in simple language that anyone can understand]
▪ He's an important layman in his church. — compare laity
