(1):

(a.) Cruel; ferocious; inhuman; merciless.

(2):

(a.) Contrary to the pure idioms of a language.

(3):

(a.) Foreign; adapted to a barbaric taste.

(4):

(a.) Being in the state of a barbarian; uncivilized; rude; peopled with barbarians; as, a barbarous people; a barbarous country.