IPA: /ˌɪlʊməˈneɪʃən/
KK: /ɪˌluːməˈneɪʃən/
The act of providing light or the state of being lit; it can also refer to the process of making something clear or easier to understand.
The illumination in the room was soft and warm, creating a cozy atmosphere.
Illumination → It is formed from "in-" (meaning in or into) and "luminare" (meaning to light up or make bright). The word refers to the act of bringing light into a space or making something bright.
Think of bringing 'light' ('luminare') 'into' ('in-') a dark place — that's what illumination means.