Definition of castes:
(n) :
Any of the hereditary social classes and subclasses of South Asian societies or similar found historically in other cultures.
(n) :
(uncountable) The division of society into castes; the caste system.
(n) :
A separate and fixed order or class of persons in society who chiefly associate with each other.
(n) :
(zoology) A class of polymorphous eusocial insects of a particular size and function within a colony.