pro-martyr adjective 1noun 1forms 3 adjective1 •In favor of or supporting martyrdom or a group of martyrs.If we now turn to another lustily pro-martyr work we can open up some more key themes and problems. — 2004 noun1 •The first martyr to die for a particular cause.John was a son, probably the younger son, of Zebedee and Salome and a brother of the elder James who became the pro-martyr of the apostles. — 1926 formspro-martyrs · more pro-martyr · most pro-martyr