lit. signifies "without understanding" (a, negative, nous, "mind"); hence, "folly," or, rather, "senselessness," 2Ti 3:9; in Luk 6:11 it denotes violent or mad rage, "madness." See MADNESS. Cp. anoetos, "foolish."
Note: For aphrosune, rendered "folly" in 2Co 11:1, AV, see FOOLISHNESS (RV).