'Tribalism' definitions:

Definition of 'tribalism'

From: WordNet
noun
The state of living together in tribes
noun
The beliefs of a tribal society

Definition of 'Tribalism'

From: GCIDE
  • Tribalism \Trib"al*ism\, n. The state of existing in tribes; also, tribal feeling; tribal prejudice or exclusiveness; tribal peculiarities or characteristics. [1913 Webster]