IPA: //ˌaɪdəlaɪˈzeɪʃən//
KK: /ˈaɪdəlaɪzeɪʃən/
The act of greatly admiring or worshiping someone or something, often to an extreme degree.
Her idolization of the pop star was evident in the way she decorated her room with posters.
Idolization is formed from "idol" (from Greek "eidolon", meaning image or statue) and "-ization" (a suffix used to form nouns indicating a process or action). The word refers to the process of treating someone or something as an idol or object of great admiration.
Think of an 'image' ('idol') that you admire greatly, and the '-ization' means the process of making that admiration official. This helps you remember that idolization is the act of treating someone as an idol.