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Definition of Caste. A caste is a social category to which a person belongs involuntarily (one's social status is ascribed); a caste contrasts with a social class. A caste system, then, is a social structure in which people belong to such social categories; historically, an example is the caste system of India.In sociology, a caste system describes one form of social stratification.astes also explain why some societies offer little social mobility: if a person occupies a low social status in that person's caste, then it is difficult or impossible for that person to achieve a higher status, as typically one cannot change one's caste.
A paradigmatic, ethnographic example is the division of Indian society into social groups. Historically, the caste system in India has consisted of thousands of endogamous groups called Jatis or Quoms and Biradaris (among Muslims).he caste system in Sri Lanka is a division of society into strata, influenced by the textbook Varnas and JÄti system found in India. Ancient Sri Lankan texts such as the Pujavaliya, Sadharmaratnavaliya and Yogaratnakaraya and inscriptional evidence show that the above hierarchy prevailed throughout the feudal period.