A separate and fixed order or class of persons in society who chiefly associate with each other.
Hyponyms: Brahmin, Kshatriya, Shudra, Vaishya, varna
Any of the hereditary social classes and subclasses of South Asian societies.
A class of polymorphous eusocial insects of a particular size and function within a colony.
A set that has a given, elsewhere specified partial order.
The ordered pair comprising a set and its partial order.