BREXIT refers to the Great Britain leaving which one of the following?

BREXIT is a portmanteau of 'British Exit,' referring to the United Kingdom's withdrawal from the European Union (EU). Following a national referendum held in June 2016, approximately 51.9% of voters decided that Britain should leave the bloc [6]. The UK officially joined the European Communities in 1973, which later evolved into the European Union via the Maastricht Treaty in 1993 [1]. The withdrawal process was formally initiated in 2017 and concluded with the UK's departure in January 2020 [2]. While the UK remains a member of the Commonwealth and the World Trade Organization (WTO), Brexit specifically ended its membership in the EU's single market and political union to regain national sovereignty over immigration and regulations [7]. International bodies like the IMF monitored the transition due to its significant global economic implications [5].

Sources

1. [2] Contemporary World Politics, Textbook in political science for Class XII (NCERT 2025 ed.) > Chapter 2: Contemporary Centres of Power > TIMELINE OF EUROPEAN INTEGRATION > p. 18
2. [1] History , class XII (Tamilnadu state board 2024 ed.) > Chapter 15: The World after World War II > European Union Flag - Euro Currency > p. 258
3. [7] https://www.congress.gov/crs-product/RL33105
4. [3] https://www.bbc.com/news/business-36284200
5. [5] https://www.cfr.org/backgrounder/what-brexit-means