proslavery adjective 1noun 1forms 2 adjective1 •Supporting slavery.By 1835 the excitement was at its height, and especially along the line of the moral and religious argumentation, where the proslavery men met talk with talk. — 1902 noun1 •Support for the institution of slavery.The old wisdom that southerners rose up in unison in 1831 after a decade of preparation in the tenets of proslavery is patently an erroneous interpretation. — 1990 formsmore proslavery · most proslavery
