As Baile

Intonation
The title As Baile can be translated as away from home.

The song itself is all intonation, although you might say the intonation is based in Irish Gaelic. Enya sings
oró, horo, mo-ray he u way, he u way and so on.
The word oró is an interjection that could be translated as
oh! or oho!, but the rest of the song is intonation.