What does "over" mean in this phrase? What part of speech is "over"? - "over at the castle"
The entire sentence:
"Over at the castle, King Uther is bringing his mother warmed milk with honey, but as the two bicker, he has an ulterior motive. "

Is "over" an adverb or preposition?

Question

What does "over" mean in this phrase? What part of speech is "over"? - "over at the castle"
The entire sentence:
"Over at the castle, King Uther is bringing his mother warmed milk with honey, but as the two bicker, he has an ulterior motive. "

Is "over" an adverb or preposition?

Answer

The preposition is 'at', and I think 'down' is functioning as an adverb: similar to saying 'Up (there) at the castle', 'Down (there) at the castle'.

Answer

The word "over" is used to show a change of location. The writer is telling a story that takes place at one location, then when he says "Over at the castle" he is now telling a story that takes place at the castle.

Answer

It's basically saying "over there/here at the castle".

This kind of prose is often used in storytelling.
For example:
The knights gathered on the field for battle. Meanwhile, over at the castle, the King looked on with aprehension.

Answer

Preposition