layperson

noun

1 a book for laypeople that explains the church's policies:

unordained person, member of the congregation, parishioner;

layman, laywoman.

▷antonyms clergyman.

2 engineering sounds highly specialized to the layperson:

nonexpert, layman, nonprofessional, amateur, nonspecialist, man in/on the street;

dilettante, enthusiast, dabbler.

▷antonyms professional, expert.