rigorist /ˈɹɪɡəɹɪst/adjective 1noun 1forms 3 adjective1 •Of, pertaining to or in the fashion of rigorists or rigorism. noun1 •Someone who takes the strictest interpretation of a law, religious injunction etc.These rigorists wanted to borrow Old Testament exclusions from participation in the Temple liturgy and apply them to pregnant women and the sexual relations of married couples. — 2009 formsrigorists · more rigorist · most rigorist