This is the 13638th most frequent Korean word.
류미진
"류미진" is a Korean name and does not have a specific definition beyond being a proper noun.
Here, 류미진 is used as a proper noun representing a specific person's name.
류미진은 한국어를 배우고 있는 학생입니다.
Ryoo Mi-jin is a student learning Korean.
In this sentence, 류미진 functions again as a proper noun, specifically as the name mentioned by the person.
오늘 아침에 만난 사람이 류미진이라고 했어요.
The person I met this morning said their name was Ryoo Mi-jin.
Once more, 류미진 is used contextually as a proper noun, referring to the individual the speaker interacted with.