Meaning of “illuminate” - Learner’s Dictionary

illuminate

verb [ T ] us uk /ɪˈluːmɪneɪt/
LIGHT

to shine lights on something:

The paintings and sculptures are illuminated by spotlights.
EXPLAIN

to explain something clearly or make it easier to understand

illumination noun [ C, U ] us uk /ɪˌluːmɪˈneɪʃən/ formal

(Definition of “illuminate” from the Cambridge Learner’s Dictionary © Cambridge University Press)