- United Kingdom
  - Composed of four countries
    - England
      - Largest and most populous
      - Contains London
    - Scotland
    - Wales
    - Northern Ireland
  - Terminology for citizens
    - English (from England)
    - Scottish (from Scotland)
    - Welsh (from Wales)
    - Northern Irish (from Northern Ireland)
  - Full official name
    - United Kingdom of Great Britain and Northern Ireland
- Great Britain
  - Geographical term
  - Largest island in the British Isles
  - Includes three nations
    - England
    - Scotland
    - Wales
- British Isles
  - Two main islands
    - Great Britain
    - Ireland
  - Republic of Ireland
    - Independent country on the island of Ireland
- Historical Context
  - Former British Empire
    - Colonies included Canada, India, etc.
    - Many colonies gained independence
  - Commonwealth
    - Includes countries like Canada, Australia
    - Remnant of former empire connections
- Additional Notes
  - British Royal Family
    - Symbolic role in governance
  - Overseas Territories
    - Small territories globally
    - Remnants of colonial past