structure (def 9).
noun 1. a course of instruction in an elementary or secondary school comprising such subjects as history, geography, civics, etc. social studies noun 1. (functioning as sing) the study of how people live and organize themselves in society, embracing geography, history, economics, and other subjects
noun, Computers. 1. the practice of generating electronic tags or keywords by users rather than specialists as a way to classify and describe online content: Social tagging can enhance students’ access to online collections of art.
noun 1. a person or a group of persons, as a family, functioning as a unit in society.
noun 1. Greek History. the war between Athens and its confederates, 357–355 b.c. 2. Roman History. the war in Italy between Rome and its allies, 90–88 b.c.