Definition of illumination noun from the Oxford Advanced Learner's Dictionary

     

    illumination

     noun
    noun
    BrE BrE//ɪˌluːmɪˈneɪʃn//
     
    ; NAmE NAmE//ɪˌluːmɪˈneɪʃn//
     
     
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  1. 1[uncountable, countable] light or a place that light comes from The only illumination in the room came from the fire.
  2. 2illuminations [plural] (British English) bright coloured lights used to decorate a town or building for a special occasion Christmas illuminations
  3. 3[countable, usually plural] a coloured decoration, usually painted by hand, in an old book
  4. 4[uncountable] (formal) understanding or explanation of something spiritual illumination In that flash of illumination, he realized where he had gone wrong.
  5. Word Origin Middle English: via Old French from late Latin illuminatio(n-), from the verb illuminare, from in- ‘upon’ + lumen, lumin- ‘light’.Extra examples Most of the illumination came from candles. The only source of illumination was a single small window. The skylight will provide good illumination from above. The skylights are designed to optimize natural illumination. lights providing a good level of illumination providing an excellent level of illumination the artificial illumination of the studio
See the Oxford Advanced American Dictionary entry: illumination