In korean pop culture terms, what is the definition of “oppa”?

Oppa is used in Korean culture by a female to a male, who is older than her by the boundary of 10 years. Female's use this title for their older brother, older male friend, or even in a flirtatious way.

Oppa is basically the term used by younger girls to address their older brothers.In kpop calling an idol older than you as oppa is normal.

where and what are the statements?

answer impressionism;