definition of
vicious

[1] #1 vicious s. [barbarous, brutal, cruel, fell, roughshod, savage] (of persons or their actions) able or disposed to inflict pain or suffering; "a barbarous crime"; "brutal beatings"; "cruel tortures"; "Stalin's roughshod treatment of the kulaks"; "a savage slap"; "vicious kicks". wn

[2] #2 vicious s. [evil] having the nature of vice. wn

[3] #3 vicious s. [condemnable, criminal, deplorable, reprehensible] bringing or deserving severe rebuke or censure; "a criminal waste of talent"; "a deplorable act of violence"; "adultery is as reprehensible for a husband as for a wife". wn

[4] #4 vicious s. [poisonous, venomous] marked by deep ill will; deliberately harmful; "poisonous hate"; "venomous criticism"; "vicious gossip". wn