Postmodernism:Postmodernism is a broad movement in thought, the arts, architecture, and criticism that from the 1960s sought to question the basic assumptions of Western culture, including the notions of universal truth, reason, language, identity, and social progress.
Metanarrative:A metanarrative is a grand, overarching story or explanation that seeks to provide a comprehensive and universal account of human knowledge, experience, and history. Lyotard argued that postmodernism rejects these totalizing metanarratives.
Language Games: Lyotard's concept of 'language games' refers to the diverse ways in which language is used in different contexts and how these different uses of language are governed by their own unique rules and practices.