one of a band of mounted men, especially in the southern U.S. during Reconstruction, who committed nocturnal acts of violence and intimidation against blacks and black sympathizers.
Origin of nightrider
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for nightrider
a member of a band of mounted and usually masked White people in the southern US who carried out acts of revenge and intimidation at night after the Civil War
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012