Entry 1 sense Webster, 1913 Puritanism /pyo͝or'-ət-ən-ĭzˌ-əm/ · Pu·ri·tan·ism · IPA /pjˈʊrətənˌɪzəm/ 01 n. The doctrines, notions, or practice of Puritans. 1. The doctrines, notions, or practice of Puritans.