Learn how to say Illumination correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word illumination:
1 [mass noun] lighting or light:
higher levels of illumination are needed for reading
(illuminations) lights used in decorating a building or other structure.
2the art of illuminating a manuscript.
[count noun] an illuminated design in a manuscript.
these books form the most sustained analysis and illumination of the subject
spiritual or intellectual enlightenment.
Middle English: via Old French from late Latin illuminatio(n-), from the verb illuminare (see illuminate)