'Cajun' definitions:

Definition of 'Cajun'

From: WordNet
noun
A Louisianian descended from Acadian immigrants from Nova Scotia (`Cajun' comes from `Acadian')

Definition of 'Cajun'

From: GCIDE
  • Cajun \Ca"jun\, n. [A corruption of Acadian.] (Ethnol.) In Louisiana, a person reputed to be Acadian French descent. Also used attributively, as in Cajun cooking. [Webster 1913 Suppl. +PJC]