Brightness, brilliance, or a flash of light; radiant splendor (chiefly British spelling variant).
An alternative or archaic spelling of fulgor, reflecting the British English spelling convention where -or endings sometimes became -our. The word still derives from Latin fulgor. This variant spelling emerged during the period when English spelling conventions were still being standardized.
Fulgour is the British spelling of fulgor, similar to how 'colour' and 'color' represent the same word in different varieties of English. Interestingly, British speakers kept the -our ending from French-influenced Middle English, while American English simplified it back to -or.
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