noun

(in ancient times) a member of a community or tribe not belonging to one of the great civilizations (Greek, Roman, Christian)

the city was besieged by the barbarians

adjective

Relating to ancient barbarians.

barbarian invasions

atheistic,unbelieving,non-believing,non-theistic,agnostic,sceptical,heretical,faithless,godless,ungodly,unholy,impious,profane,infidel,barbarian,barbarous,heathen,heathenish,idolatrous,pagan