il·lu·mi·na·tion 
/ɪˌlu:məˈneɪʃən/ noun
plural il·lu·mi·na·tions /ɪˌlu:məˈneɪʃən/ noun 1 [noncount] : light that comes into a room, that shines on something, etc.
▪ The room's only illumination [=lighting] came from a small window. ▪ When taking photographs indoors, use a flash for illumination. 2 [noncount] formal : knowledge or understanding
▪ They traveled to the temple in search of spiritual illumination. 3 [count] : a gold or colored decoration in an old book
▪ an old manuscript with beautiful illuminations 4 illuminations [plural] Brit : lights used as decorations
▪ Illuminations were hung throughout the city.
▪ The room's only illumination [=lighting] came from a small window. ▪ When taking photographs indoors, use a flash for illumination.
▪ They traveled to the temple in search of spiritual illumination.
▪ an old manuscript with beautiful illuminations
▪ Illuminations were hung throughout the city.
