Evie, it means? "Hi" or "Hello" in "Korean." =:} Written in "Hangul" is this 안녕: Annyeong = Hi and 안녕하세요: Annyeonghaseyo = Hi or goodbye in any way you use it in to greet to someone in informal or formal way.
*Hehehe* Ps: Very common word that everyone knows how to say.
*Hehehe* Ps: Very common word that everyone knows how to say.

*Hehehe*