Definition of megalomartyr in US English:

megalomartyr

noun

Orthodox Church
  • A martyr to whom particular veneration is given.

Origin

Late 18th century; earliest use found in Alban Butler (1709–1773), Roman Catholic priest and hagiographer. From Byzantine Greek μεγαλόμαρτυρ-, μεγαλόμαρτυς from ancient Greek μεγαλο- + Hellenistic Greek μάρτυρ.