noun
1. : underground railway
2. usually capitalized U&R : a system of cooperation among active antislavery people in the United States before 1863 by which fugitive slaves were secretly helped to reach the North or Canada
noun
1. : underground railway
2. usually capitalized U&R : a system of cooperation among active antislavery people in the United States before 1863 by which fugitive slaves were secretly helped to reach the North or Canada
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012