eu·he·mer·ism \yüˈhēməˌrizəm, -hem-\noun (-s) Etymology:Euhemerus, 4th century B.C. Greek mythographer + English -ism 1.often capitalized: a theory held by Euhemerus that the gods of mythology were but deified mortals 2.sometimes capitalized: interpretation of myths as traditional accounts of historical persons and events