Definition of barbaric adjective from the Oxford Advanced American Dictionary
barbaric
adjective
/bɑrˈbærɪk; bɑrˈbɛrɪk/
1cruel and violent, and not as expected from people who are educated and respect each othera barbaric act/custom/ritualThe way these animals are killed is barbaric.2connected with barbariansbarbarically
/bɑrˈbærɪkli/
/bɑrˈbɛrɪkli/
adverbThese prisoners have been treated barbarically.