British spelling variant of cosplendor; shared brightness, radiance, or magnificence.
From co- + splendour (British English spelling of splendor, from Latin splendor). The -our ending follows British spelling conventions.
The British -our ending (like 'honour' and 'colour') actually comes from Norman French influence after 1066, and this archaic word preserves that historical spelling variation.
Complete word intelligence in one call. Free tier — 50 lookups/day.