britannia

noun

1. the ancient Roman name of the island of Great Britain, especially the S part where the early Roman provinces were.
2. the British Empire.
3. Chiefly Literary.
   1. Great Britain.
   2. the United Kingdom of Great Britain and Ireland.
4. the figure of a seated woman with trident and helmet used as a symbolic representation of Great Britain and the British Empire.

noun

1. a female warrior carrying a trident and wearing a helmet, personifying Great Britain or the British Empire
2. (in the ancient Roman Empire) the S part of Great Britain
3. short for Britannia coin