/ bɑːˈbeəriən; NAmE bɑːrˈber-/ noun
1.
a person long ago in the past who belonged to a European people which was considered wild and uncivilized :
barbarian invasions of the fifth century
2.
a person who behaves very badly and has no respect for art, education, etc.
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WORD ORIGIN
Middle English (as an adjective used in a derogatory way to denote a person with different speech and customs): from Old French barbarien , from barbare , or from Latin barbarus , from Greek barbaros foreign.