What is the Latin word for britain?

The usual Latin words for “britain” are Britannia, Britannicus, Brittō. The right choice depends on the sense; see the distinctions below.

English → Latin

“britain” in Latin

BritanniaBritain (a region of Western Europe, the country of the Britons); Great Britain (an island of Western Europe); Britannia BritannicusBritish Brittōa Briton (an inhabitant of Britain); a Breton (an inhabitant of Brittany)

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

britain

Britannia.

Britain

Britannia, -ae (f.); Great Britain, Magna Britannia: of or belonging to Britain. British, Britannicus, -a, -um, and Britannus, -a. -um : pecul. poet. feminine, Britannis, -idis; a Briton, Britannus, -i (m.); Britto, -onis (m.), late; the British, Britanni, -orum (m.); the British Isles, Insulae Britinnicae; the British Channel, Oceanus Britannicus; New Britain. Brititnnia Nova

Quick answer

What is the Latin word for britain?: The usual Latin words for “britain” are Britannia, Britannicus, Brittō. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.