Home › Words › T › tylerismtylerismtylerism means the policies of U.S. president John Tyler.Among words judged in Lexicurio's Arena, tylerism ranks #2,165 of 42,747 for Qualifying.EtymologyFrom Tyler + -ism. The abandoning-political-party sense came from John Tyler who is said to have done this after William Henry Harrison died in office.nounThe policies of U.S. president John Tyler.The practice of abandoning the political party to which political office is owed, defecting while in office, committing political apostasy.The Reformed theology of Bennet Tyler.Definitions & examples from Wiktionary (CC BY-SA 3.0).