Illumination (noun)

1. The act or process of providing or producing light.
2. The state of being illuminated or lit up.
3. An idea or understanding that clarifies a situation or concept.

Origin:

Derived from the latin word 'illuminare' meaning 'to light up'.

Examples:

1. The illumination of the room was provided by a chandelier hanging from the ceiling.
2. The illumination of the city at night was breathtaking.
3. The illumination of the ancient text was the work of a team of scholars.
4. The illumination of his mind came after he read the book.
5. The illumination of the stage was provided by the spotlight.