| Noun | 1. | Ku Klux Klan - a secret society of white Southerners in the United States; was formed in the 19th century to resist the emancipation of slaves; used terrorist tactics to suppress Black peopleklavern - a local unit of the Ku Klux Klan secret society - a society that conceals its activities from nonmembers South - the region of the United States lying south of the Mason-Dixon Line | |