Definition of group theory in English:

group theory

noun

  • 1Mathematics and Science. The branch of algebra concerned with the properties and applications of groups.

  • 2Sociology. Any of various theories concerned with the dynamics within or between social groups, or with the influence of social groups on people's thinking or behaviour.

Origin

Late 19th century. From group + theory, in sense 1 after German Gruppentheorie.

Pronunciation

group theory

/ˈɡruːp ˌθɪəri/