il ‧ lu ‧ mi ‧ na ‧ tion /ɪˌluːməˈneɪʃ ə n, ɪˌluːmɪˈneɪʃ ə n, ɪˌljuː- $ ɪˌluː-/ BrE AmE noun formal
1 . [uncountable] lighting provided by a lamp, light etc:
White candles, the only illumination, burned on the table.
soft illumination
2 . [countable usually plural] a picture or pattern painted on a page of a book, especially in the past:
the illuminations in a medieval manuscript
3 . illuminations [plural] British English a show of coloured lights used to make a town bright and colourful:
the Blackpool illuminations
4 . [uncountable and countable] formal a clear explanation or understanding of a particular subject