What is the meaning of underground railway?

noun

  • Secret aid to escaping slaves that was provided by abolitionists in the years before the American Civil War.
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). underground railway. Retrieved September 21, 2026, from http://smartdefine.org/underground_railway/definitions/1318121
ChicagoWordNet. 2010. "underground railway" http://smartdefine.org/underground_railway/definitions/1318121 (accessed September 21, 2026).
HarvardWordNet 2010, underground railway, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/underground_railway/definitions/1318121>.
MLAWordNet. "underground railway" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/underground_railway/definitions/1318121>