/ɪ,lu:mɪ'neɪʃn; ɪ,lumə`neʃən/
n
1 [U] illuminating or being illuminated; (source of) light 照明; 照度; 光（源）.
2 illuminations [pl] (Brit) bright colourful lights used to decorate a town for a special occasion 彩灯; 灯饰
*the Christmas illuminations in the high street 大街上的圣诞节彩灯.
3 [C usu pl 通常作复数] coloured decoration, usu painted by hand, in an old book （旧书上的）彩饰, 图案花饰（通常为手工制作的）.

n formal
[U]
lighting provided by a lamp, light etc
　White candles, the only illumination, burned on the table.
　The rooms were flooded with soft illumination.
[C usually plural]
a picture or pattern painted on a page of a book, especially in the past
　the illuminations in a medieval manuscript
illuminations
BrE a show of coloured lights used to make a town bright and colourful
　the Blackpool illuminations
[U and C]formal
a clear explanation or understanding of a particular subject