Great Britain

Short definition from Wiktionary

Proper noun

1. 1
   A large island (sometimes also including some of the surrounding smaller islands) off the north-west coast of Western Europe, made up of England, Scotland, and Wales.
2. 2
   The United Kingdom, a kingdom and country in Northern Europe including the island of Great Britain as well as Northern Ireland on the northeastern portion of the island of Ireland.
3. 3
   A former kingdom existing on the island of Great Britain from 1707 to 1801, consisting of England, Scotland and Wales; it was in personal union with the Kingdom of Ireland and later merged with it. Official name: Kingdom of Great Britain.
4. 4
   England, Scotland and Wales in combination, to the exclusion of Northern Ireland.
5. 5
   The United Kingdom national team (often inclusive of Northern Ireland).