laymanEnglishOxford American Thesauruslayman noun 1 layperson, unordained person, member of the congregation, parishioner; laywoman. ▷antonyms clergyman. 2 nonexpert, layperson, nonprofessional, amateur, nonspecialist, man in/on the street; dilettante, enthusiast, dabbler. ▷antonyms professional, expert.