Definition of caste noun from the Oxford Advanced Learner's Dictionary

     

    caste

     noun
    noun
    BrE BrE//kɑːst//
     
    ; NAmE NAmE//kæst//
     
     
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  1. 1 [countable] any of the four main divisions of Hindu society, originally those made according to functions in society the caste system high-caste Brahmins
  2. 2[countable] a social class, especially one whose members do not allow others to join it the ruling caste
  3. 3[uncountable] the system of dividing society into classes based on differences in family origin, rank or wealth
  4. Word Origin mid 16th cent. (in the general sense ‘race, breed’): from Spanish and Portuguese casta ‘lineage, race, breed’, feminine of casto ‘pure, unmixed’, from Latin castus ‘chaste’.Extra examples He belongs to one of the highest castes. low-caste families the Hindu caste system
See the Oxford Advanced American Dictionary entry: caste