Marathonian adjective 1noun 1forms 1 adjective1 •Of or relating to Marathon in ancient Greece.[…] not even the magnificent fiction of the Marathonian warrior-poet could have rendered righteous the sacrilege of Prometheus’ mutiny against the will of the omnipotent father of gods and man. — 1924 noun1 •A native or inhabitant of Marathon in ancient Greece. formsMarathonians