(with article, collective) The residents or inhabitants of Great Britain. / (with article, collective) The citizens or inhabitants of the United Kingdom.

Of Britain. / Of the United Kingdom. / Of the Commonwealth of Nations, or the British Empire. / (historical) Of the ancient inhabitants of the southern part of Britain; Brythonic.

(now chiefly Canada, US, India) A Briton. / (India) The British colonial authorities; a European member of the British Raj, especially an officer from the colonial authorities.

(rare) British.

plural of Britisher

The state or quality of being British.

plural of Britishism

A word, phrase, idiom, or expression peculiar to the English language as spoken in Britain. / The practice of British religion or culture.

(transitive, intransitive) To make or become British.

plural of Britishness