Etymology
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U.K.

abbreviation of United Kingdom, attested from 1883.

updated on March 05, 2014

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Definitions of U.K. from WordNet

U.K. (n.)
a monarchy in northwestern Europe occupying most of the British Isles; divided into England and Scotland and Wales and Northern Ireland; `Great Britain' is often used loosely to refer to the United Kingdom;
Synonyms: United Kingdom / uk / Britain / United Kingdom of Great Britain and Northern Ireland / Great Britain
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.