Britain - the historical name first of all the British Isles (lat. Britanniae); followed by the name of only one of these islands - Great Britain (lat. Britannia). It is derived from the Britons - the main population to V in. n. e., but in Welsh literature contains information about what the word Pryden was originally self-designation of the Picts and only then spread to the entire population of ancient Britain. [1]Britain (lat. Britannia Romana) - Province of the Roman Empire, roughly corresponded to the territory of England and Wales.Britain - the name of the state or the United Kingdom British Empire in spoken or high style: "Rule, Britannia!", "Proud Briton," and so on. D.Britain - a municipality in Brazil.Britannia (Ultima) - in the fictional universe of computer games series «Ultima» sosarianskoe is the largest state based Lord British.