barbarian

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A member of one of the non-Greek peoples in the ancient world, regarded by the ancient Greeks as culturally inferior.
• noun A member of any of various peoples living outside the Roman Empire or not fully integrated into Greco-Roman civilization.
• noun A member of a people considered uncivilized or culturally inferior by members of another people.
• noun A fierce, brutal, or cruel person.
• noun An insensitive, uncultured person. synonym: boor.

from The Century Dictionary.

• noun A member of a barbarian people. See II., 5.
• In anthropology, pertaining to a state of society in which descent is reckoned in the paternal line, and in which the members of the paternal family of all generations form an exogamous social unit called a gens.
• noun A foreigner; one whose language and customs differ from those of the speaker or writer.
• noun One outside the pale of Christian civilization.
• noun A man in a rude, savage state; an uncivilized person.
• noun An uncultured person; one who has no sympathy with culture; a philistine.
• noun A cruel, savage, brutal person; one destitute of pity or humanity: as, “thou fell barbarian,”
• noun [capitalized] A native of Barbary.
• Foreign; of another or outside nation; hence, non-Hellenic, non-Roman, non-Christian, non-Chinese, etc.
• Of or pertaining to savages; rude; uncivilized.
• Cruel; inhuman; barbarous.
• [capitalized] Of or belonging to Barbary.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Of, or pertaining to, or resembling, barbarians; rude; uncivilized; barbarous.
• noun Historical A foreigner.
• noun A man in a rude, savage, or uncivilized state.
• noun A person destitute of culture.
• noun A cruel, savage, brutal man; one destitute of pity or humanity.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Relating to people, countries or customs perceived as uncivilized or inferior.
• noun An uncivilized or uncultured person, originally compared to the hellenistic Greco-Roman civilisation; often associated with fighting or other such shows of strength.
• noun derogatory Someone from a developing country or backward culture.
• noun A warrior, clad in fur or leather, associated with Sword and Sorcery stories.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a crude uncouth ill-bred person lacking culture or refinement
• adjective without civilizing influences
• noun a member of an uncivilized people