Definition of "proslavery" [pro•slav•er•y]

• Advocating the practice of slavery. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "One living park fixture, Richard Kessler, is convinced Olmsted had Lincoln face north to defy proslavery tycoons in Manhattan."
• "He was tried for treason against the state of Virginia, the murder of five proslavery Southerners, and inciting a slave insurrection and was subsequently hanged."
• "During most of the antebellum period (roughly 1790 – 1860) proslavery forces had much more power in Congress and the executive branch than antislavery ones, and a unitary policy on slavery and/or the rights of free blacks at that time would probably meant a compromise far closer to the slave state laws of the day than the free state ones."