idol
‘Aidol’ (아이돌), it is the Korean pronunciation of the English word “idol” and denotes the good-looking and systematically trained all-round entertainer in the Korean media and in mainstream pop music. As a product of Korean entertainment companies, the aidol basically resembles its counterpart in Anglo-American pop music (“pop idol”) and in Japanese pop music (aidoru) although showing significant differences in regard to specific local contexts of production and consumption. (Lee 2019, p.13)

k-pop
Korean popular music that 1) was released after 1992, 2) is sung and performed (usually with elaborate choreography) by idol groups where the majority of the members are of Korean nationality, and 3) is performed by idol singers who are managed by Korean management companies. (Lee 2019, p.11)