night.rid.er
n.(名词)One of a secret band of mounted, usually masked white men who engaged in nocturnal terrorism for revenge or intimidation in the southern United States especially during Reconstruction.夜间骑行的人:美国南部夜间蒙面骑行的白人秘密组织的一员,他们进行暴力活动以达到惩罚或恐怖目的,尤其在南北战争后的重建时期