(obsolete or rare) The United States.

the Kingdom of Great Britain / (nonstandard) United Kingdom

One of the six principal organs of the United Nations and the only one in which all member nations have equal representation.

(UK politics) Alternative form of UK Independence Party.

(US, military, politics) The spaceforce of the United States. A branch of the United States of America military dedicated to outer space activities and related support activities.

(historical) A Greek state and amical protectorate of the United Kingdom between 1815 and 1864, including the Ionian Islands and the town of Parga on the adjacent mainland in modern Greece.

A collection of islands and archipelagos, consisting of various dependent territories of the United States, including: Baker Island, Howland Island, Jarvis Island, Johnston Atoll, Kingman Reef, the Midway Islands, Navassa Island, Palmyra Atoll, and Wake Island.

The official name of the United Kingdom 1801-1927 (before being renamed by the Royal and Parliamentary Titles Act 1927 following the creation of the Irish Free State in 1922).

One of the six principal organs of the United Nations, dedicated to coordinate global economical and social affairs.

(metrology) A standard set of units of measurement for use in scientific literature worldwide. The newest and most widespread version of the metric system.