The founder of a heresy or the leader of a heretical sect.
More example sentences
- In its confrontation with heresiarchs, the Church learned to read the Scriptures in a way that should still inform us today.
- So will there be wars of religion between orthodox Anglicans and heresiarchs in the break-away communions of North America?
- When the convocation met there were a great many sermons preached by various learned and eloquent divines, but nothing was produced which was pronounced by the general voice a satisfactory answer to the doctrines of the heresiarch.
mid 16th century: via ecclesiastical Latin from ecclesiastical Greek hairesiarkhēs 'leader of a sect', from hairesis 'heretical sect, heresy' + arkhēs 'ruler'.
Definition of heresiarch in:
- The US English dictionary